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Collection: Springs - Extension - Music Wire

Springs (With Images)

Extension

Music Wire
Stainless Steel

894 Products in this selection

Includes long lengths up to 1 metre
Zinc Plated Spring Steel not recommended for applications exceeding 121 ^oC (250 Deg F).
302 Stainless springs not recommended for applications exceeding 260 ^oC (500 Deg F).
302 stainless steel is slightly magnetic.

Additional resources:
Spings Catalogue PDF
Spring Anchors

A more concise listing may be found on the Smallparts store at Springs - Extension - Music Wire. Smallparts promote the most popular MBA products.

OD (D0)	Overall Length (L0)	Wire Diameter (d)	Max. Extension (L1)	Spring Rate	Initial Tension (IT)	Indicative Image
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 29.60 mm	Spring Rate 0.14 N/mm	Initial Tension (IT) 0.2 N
Material: Steel Load at L1: 2.26 N
Part Number: ES-0400-0150-035-M (5 Pcs) Extension Springs - 4x15x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0)	Overall Length (L0)	Wire Diameter (d)	Max. Extension (L1)	Indicative Image
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 29.60 mm
Material: Steel Spring Rate: 0.14 N/mm Initial Tension (IT): 0.2 N Load at L1: 2.26 N
Part Number: ES-0400-0150-035-M (5 Pcs) Extension Springs - 4x15x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-035-M (5 Pcs) --- Extension Springs - 4x15x0.35 mm - Steel ES-0400-0150-035-M (5 Pcs) --- Extension Springs - 4x15x0.35 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 25.00 mm	Spring Rate 0.26 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0150-04-M (5 Pcs) Extension Springs - 4x15x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 25.00 mm
Material: Steel Spring Rate: 0.26 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0150-04-M (5 Pcs) Extension Springs - 4x15x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-04-M (5 Pcs) --- Extension Springs - 4x15x0.4 mm - Steel ES-0400-0150-04-M (5 Pcs) --- Extension Springs - 4x15x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 22.50 mm	Spring Rate 0.51 N/mm	Initial Tension (IT) 1.0 N
Material: Steel Load at L1: 4.81 N
Part Number: ES-0400-0150-045-M (5 Pcs) Extension Springs - 4x15x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 22.50 mm
Material: Steel Spring Rate: 0.51 N/mm Initial Tension (IT): 1.0 N Load at L1: 4.81 N
Part Number: ES-0400-0150-045-M (5 Pcs) Extension Springs - 4x15x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-045-M (5 Pcs) --- Extension Springs - 4x15x0.45 mm - Steel ES-0400-0150-045-M (5 Pcs) --- Extension Springs - 4x15x0.45 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 21.50 mm	Spring Rate 0.78 N/mm	Initial Tension (IT) 1.2 N
Material: Steel Load at L1: 6.37 N
Part Number: ES-0400-0150-05-M (5 Pcs) Extension Springs - 4x15x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 21.50 mm
Material: Steel Spring Rate: 0.78 N/mm Initial Tension (IT): 1.2 N Load at L1: 6.37 N
Part Number: ES-0400-0150-05-M (5 Pcs) Extension Springs - 4x15x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-05-M (5 Pcs) --- Extension Springs - 4x15x0.5 mm - Steel ES-0400-0150-05-M (5 Pcs) --- Extension Springs - 4x15x0.5 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 19.50 mm	Spring Rate 1.47 N/mm	Initial Tension (IT) 1.9 N
Material: Steel Load at L1: 8.43 N
Part Number: ES-0400-0150-055-M (5 Pcs) Extension Springs - 4x15x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 19.50 mm
Material: Steel Spring Rate: 1.47 N/mm Initial Tension (IT): 1.9 N Load at L1: 8.43 N
Part Number: ES-0400-0150-055-M (5 Pcs) Extension Springs - 4x15x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-055-M (5 Pcs) --- Extension Springs - 4x15x0.55 mm - Steel ES-0400-0150-055-M (5 Pcs) --- Extension Springs - 4x15x0.55 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.600 mm _{(0.024 in.)}	Max. Extension (L1) 19.00 mm	Spring Rate 2.16 N/mm	Initial Tension (IT) 2.6 N
Material: Steel Load at L1: 11.10 N
Part Number: ES-0400-0150-06-M (5 Pcs) Extension Springs - 4x15x0.6 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 15 mm _{(0.591 in.)}	Wire Diameter (d) 0.600 mm _{(0.024 in.)}	Max. Extension (L1) 19.00 mm
Material: Steel Spring Rate: 2.16 N/mm Initial Tension (IT): 2.6 N Load at L1: 11.10 N
Part Number: ES-0400-0150-06-M (5 Pcs) Extension Springs - 4x15x0.6 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0150-06-M (5 Pcs) --- Extension Springs - 4x15x0.6 mm - Steel ES-0400-0150-06-M (5 Pcs) --- Extension Springs - 4x15x0.6 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 44.10 mm	Spring Rate 0.08 N/mm	Initial Tension (IT) 0.2 N
Material: Steel Load at L1: 2.26 N
Part Number: ES-0400-0200-035-M (5 Pcs) Extension Springs - 4x20x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 44.10 mm
Material: Steel Spring Rate: 0.08 N/mm Initial Tension (IT): 0.2 N Load at L1: 2.26 N
Part Number: ES-0400-0200-035-M (5 Pcs) Extension Springs - 4x20x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-035-M (5 Pcs) --- Extension Springs - 4x20x0.35 mm - Steel ES-0400-0200-035-M (5 Pcs) --- Extension Springs - 4x20x0.35 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 36.80 mm	Spring Rate 0.16 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0200-04-M (5 Pcs) Extension Springs - 4x20x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 36.80 mm
Material: Steel Spring Rate: 0.16 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0200-04-M (5 Pcs) Extension Springs - 4x20x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-04-M (5 Pcs) --- Extension Springs - 4x20x0.4 mm - Steel ES-0400-0200-04-M (5 Pcs) --- Extension Springs - 4x20x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 32.20 mm	Spring Rate 0.31 N/mm	Initial Tension (IT) 1.0 N
Material: Steel Load at L1: 4.81 N
Part Number: ES-0400-0200-045-M (5 Pcs) Extension Springs - 4x20x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 32.20 mm
Material: Steel Spring Rate: 0.31 N/mm Initial Tension (IT): 1.0 N Load at L1: 4.81 N
Part Number: ES-0400-0200-045-M (5 Pcs) Extension Springs - 4x20x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-045-M (5 Pcs) --- Extension Springs - 4x20x0.45 mm - Steel ES-0400-0200-045-M (5 Pcs) --- Extension Springs - 4x20x0.45 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 30.20 mm	Spring Rate 0.49 N/mm	Initial Tension (IT) 1.2 N
Material: Steel Load at L1: 6.37 N
Part Number: ES-0400-0200-05-M (5 Pcs) Extension Springs - 4x20x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 30.20 mm
Material: Steel Spring Rate: 0.49 N/mm Initial Tension (IT): 1.2 N Load at L1: 6.37 N
Part Number: ES-0400-0200-05-M (5 Pcs) Extension Springs - 4x20x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-05-M (5 Pcs) --- Extension Springs - 4x20x0.5 mm - Steel ES-0400-0200-05-M (5 Pcs) --- Extension Springs - 4x20x0.5 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 27.10 mm	Spring Rate 0.93 N/mm	Initial Tension (IT) 1.9 N
Material: Steel Load at L1: 8.43 N
Part Number: ES-0400-0200-055-M (5 Pcs) Extension Springs - 4x20x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 27.10 mm
Material: Steel Spring Rate: 0.93 N/mm Initial Tension (IT): 1.9 N Load at L1: 8.43 N
Part Number: ES-0400-0200-055-M (5 Pcs) Extension Springs - 4x20x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-055-M (5 Pcs) --- Extension Springs - 4x20x0.55 mm - Steel ES-0400-0200-055-M (5 Pcs) --- Extension Springs - 4x20x0.55 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.600 mm _{(0.024 in.)}	Max. Extension (L1) 26.40 mm	Spring Rate 1.37 N/mm	Initial Tension (IT) 2.6 N
Material: Steel Load at L1: 11.10 N
Part Number: ES-0400-0200-06-M (5 Pcs) Extension Springs - 4x20x0.6 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 20 mm _{(0.787 in.)}	Wire Diameter (d) 0.600 mm _{(0.024 in.)}	Max. Extension (L1) 26.40 mm
Material: Steel Spring Rate: 1.37 N/mm Initial Tension (IT): 2.6 N Load at L1: 11.10 N
Part Number: ES-0400-0200-06-M (5 Pcs) Extension Springs - 4x20x0.6 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0200-06-M (5 Pcs) --- Extension Springs - 4x20x0.6 mm - Steel ES-0400-0200-06-M (5 Pcs) --- Extension Springs - 4x20x0.6 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 47.50 mm	Spring Rate 0.12 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0250-04-M (5 Pcs) Extension Springs - 4x25x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 47.50 mm
Material: Steel Spring Rate: 0.12 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0250-04-M (5 Pcs) Extension Springs - 4x25x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0250-04-M (5 Pcs) --- Extension Springs - 4x25x0.4 mm - Steel ES-0400-0250-04-M (5 Pcs) --- Extension Springs - 4x25x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 41.90 mm	Spring Rate 0.23 N/mm	Initial Tension (IT) 1.0 N
Material: Steel Load at L1: 4.81 N
Part Number: ES-0400-0250-045-M (50 Pcs) Extension Springs - 4x25x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Per 50
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 41.90 mm
Material: Steel Spring Rate: 0.23 N/mm Initial Tension (IT): 1.0 N Load at L1: 4.81 N
Part Number: ES-0400-0250-045-M (50 Pcs) Extension Springs - 4x25x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Per 50 View the product page first if you are unsure.
ES-0400-0250-045-M (50 Pcs) --- Extension Springs - 4x25x0.45 mm - Steel ES-0400-0250-045-M (50 Pcs) --- Extension Springs - 4x25x0.45 mm - Steel Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 38.90 mm	Spring Rate 0.39 N/mm	Initial Tension (IT) 1.2 N
Material: Steel Load at L1: 6.37 N
Part Number: ES-0400-0250-05-M (5 Pcs) Extension Springs - 4x25x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 38.90 mm
Material: Steel Spring Rate: 0.39 N/mm Initial Tension (IT): 1.2 N Load at L1: 6.37 N
Part Number: ES-0400-0250-05-M (5 Pcs) Extension Springs - 4x25x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0250-05-M (5 Pcs) --- Extension Springs - 4x25x0.5 mm - Steel ES-0400-0250-05-M (5 Pcs) --- Extension Springs - 4x25x0.5 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 35.00 mm	Spring Rate 0.66 N/mm	Initial Tension (IT) 1.9 N
Material: Steel Load at L1: 8.43 N
Part Number: ES-0400-0250-055-M (5 Pcs) Extension Springs - 4x25x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 25 mm _{(0.984 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 35.00 mm
Material: Steel Spring Rate: 0.66 N/mm Initial Tension (IT): 1.9 N Load at L1: 8.43 N
Part Number: ES-0400-0250-055-M (5 Pcs) Extension Springs - 4x25x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0250-055-M (5 Pcs) --- Extension Springs - 4x25x0.55 mm - Steel ES-0400-0250-055-M (5 Pcs) --- Extension Springs - 4x25x0.55 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 72.70 mm	Spring Rate 0.05 N/mm	Initial Tension (IT) 0.2 N
Material: Steel Load at L1: 2.26 N
Part Number: ES-0400-0300-035-M (5 Pcs) Extension Springs - 4x30x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 72.70 mm
Material: Steel Spring Rate: 0.05 N/mm Initial Tension (IT): 0.2 N Load at L1: 2.26 N
Part Number: ES-0400-0300-035-M (5 Pcs) Extension Springs - 4x30x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0300-035-M (5 Pcs) --- Extension Springs - 4x30x0.35 mm - Steel ES-0400-0300-035-M (5 Pcs) --- Extension Springs - 4x30x0.35 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 58.40 mm	Spring Rate 0.09 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0300-04-M (5 Pcs) Extension Springs - 4x30x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 58.40 mm
Material: Steel Spring Rate: 0.09 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0300-04-M (5 Pcs) Extension Springs - 4x30x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0300-04-M (5 Pcs) --- Extension Springs - 4x30x0.4 mm - Steel ES-0400-0300-04-M (5 Pcs) --- Extension Springs - 4x30x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 51.70 mm	Spring Rate 0.18 N/mm	Initial Tension (IT) 1.0 N
Material: Steel Load at L1: 4.81 N
Part Number: ES-0400-0300-045-M (5 Pcs) Extension Springs - 4x30x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.450 mm _{(0.018 in.)}	Max. Extension (L1) 51.70 mm
Material: Steel Spring Rate: 0.18 N/mm Initial Tension (IT): 1.0 N Load at L1: 4.81 N
Part Number: ES-0400-0300-045-M (5 Pcs) Extension Springs - 4x30x0.45 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0300-045-M (5 Pcs) --- Extension Springs - 4x30x0.45 mm - Steel ES-0400-0300-045-M (5 Pcs) --- Extension Springs - 4x30x0.45 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 47.50 mm	Spring Rate 0.29 N/mm	Initial Tension (IT) 1.2 N
Material: Steel Load at L1: 6.37 N
Part Number: ES-0400-0300-05-M (5 Pcs) Extension Springs - 4x30x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 30 mm _{(1.181 in.)}	Wire Diameter (d) 0.500 mm _{(0.02 in.)}	Max. Extension (L1) 47.50 mm
Material: Steel Spring Rate: 0.29 N/mm Initial Tension (IT): 1.2 N Load at L1: 6.37 N
Part Number: ES-0400-0300-05-M (5 Pcs) Extension Springs - 4x30x0.5 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0300-05-M (5 Pcs) --- Extension Springs - 4x30x0.5 mm - Steel ES-0400-0300-05-M (5 Pcs) --- Extension Springs - 4x30x0.5 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 35 mm _{(1.378 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 68.70 mm	Spring Rate 0.08 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0350-04-M (5 Pcs) Extension Springs - 4x35x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 35 mm _{(1.378 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 68.70 mm
Material: Steel Spring Rate: 0.08 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0350-04-M (5 Pcs) Extension Springs - 4x35x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0350-04-M (5 Pcs) --- Extension Springs - 4x35x0.4 mm - Steel ES-0400-0350-04-M (5 Pcs) --- Extension Springs - 4x35x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 35 mm _{(1.378 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 50.20 mm	Spring Rate 0.43 N/mm	Initial Tension (IT) 1.9 N
Material: Steel Load at L1: 8.43 N
Part Number: ES-0400-0350-055-M (50 Pcs) Extension Springs - 4x35x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Per 50
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 35 mm _{(1.378 in.)}	Wire Diameter (d) 0.550 mm _{(0.022 in.)}	Max. Extension (L1) 50.20 mm
Material: Steel Spring Rate: 0.43 N/mm Initial Tension (IT): 1.9 N Load at L1: 8.43 N
Part Number: ES-0400-0350-055-M (50 Pcs) Extension Springs - 4x35x0.55 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Per 50 View the product page first if you are unsure.
ES-0400-0350-055-M (50 Pcs) --- Extension Springs - 4x35x0.55 mm - Steel ES-0400-0350-055-M (50 Pcs) --- Extension Springs - 4x35x0.55 mm - Steel Regular price $130.14 AUD Regular price Sale price $130.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 40 mm _{(1.575 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 100.30 mm	Spring Rate 0.03 N/mm	Initial Tension (IT) 0.2 N
Material: Steel Load at L1: 2.26 N
Part Number: ES-0400-0400-035-M (5 Pcs) Extension Springs - 4x40x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 40 mm _{(1.575 in.)}	Wire Diameter (d) 0.350 mm _{(0.014 in.)}	Max. Extension (L1) 100.30 mm
Material: Steel Spring Rate: 0.03 N/mm Initial Tension (IT): 0.2 N Load at L1: 2.26 N
Part Number: ES-0400-0400-035-M (5 Pcs) Extension Springs - 4x40x0.35 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0400-035-M (5 Pcs) --- Extension Springs - 4x40x0.35 mm - Steel ES-0400-0400-035-M (5 Pcs) --- Extension Springs - 4x40x0.35 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 40 mm _{(1.575 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 78.50 mm	Spring Rate 0.07 N/mm	Initial Tension (IT) 0.6 N
Material: Steel Load at L1: 3.24 N
Part Number: ES-0400-0400-04-M (5 Pcs) Extension Springs - 4x40x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5
OD (D0) 4.00 mm _{(0.157 in.)}	Overall Length (L0) 40 mm _{(1.575 in.)}	Wire Diameter (d) 0.400 mm _{(0.016 in.)}	Max. Extension (L1) 78.50 mm
Material: Steel Spring Rate: 0.07 N/mm Initial Tension (IT): 0.6 N Load at L1: 3.24 N
Part Number: ES-0400-0400-04-M (5 Pcs) Extension Springs - 4x40x0.4 mm - Steel Out of Stock \| Backorder Now \| Orders can be expected around Tue, Jun 17, 2025 Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Per 5 View the product page first if you are unsure.
ES-0400-0400-04-M (5 Pcs) --- Extension Springs - 4x40x0.4 mm - Steel ES-0400-0400-04-M (5 Pcs) --- Extension Springs - 4x40x0.4 mm - Steel Regular price $13.14 AUD Regular price Sale price $13.14 AUD Unit price per Out of stock! Backorder Now