RS PRO Steel Extension Spring, 78.5mm x 18mm
- RS Stock No.:
- 121-393
- Brand:
- RS PRO
Subtotal (1 pack of 5 units)*
£22.05
(exc. VAT)
£26.45
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 50 unit(s) ready to ship from another location
- Plus 85 unit(s) shipping from 28 November 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Pack* |
|---|---|---|
| 5 + | £4.41 | £22.05 |
*price indicative
- RS Stock No.:
- 121-393
- Brand:
- RS PRO
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | RS PRO | |
| Material | Steel | |
| Free Length | 78.5mm | |
| Maximum Extended Length | 93.50mm | |
| Outside Diameter | 18mm | |
| Wire Diameter | 3.6mm | |
| Initial Tension | 93N | |
| Spring Rate | 35.8N/mm | |
Select all | ||
|---|---|---|
Brand RS PRO | ||
Material Steel | ||
Free Length 78.5mm | ||
Maximum Extended Length 93.50mm | ||
Outside Diameter 18mm | ||
Wire Diameter 3.6mm | ||
Initial Tension 93N | ||
Spring Rate 35.8N/mm | ||
- COO (Country of Origin):
- GB
Music Wire Extension Springs
Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends.
Features and Benefits
Attached at both ends
Springs absorb and store energy
Create resistance to pulling force
Initial tension manipulation can achieve individual requirements
Wound to oppose extension
Applications:
Automotive interiors and exteriors
Garage door assemblies
Vise-grip pliers
Carburetors
Trampolines
Washing devices
Farm machinery
Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends.
Features and Benefits
Attached at both ends
Springs absorb and store energy
Create resistance to pulling force
Initial tension manipulation can achieve individual requirements
Wound to oppose extension
Applications:
Automotive interiors and exteriors
Garage door assemblies
Vise-grip pliers
Carburetors
Trampolines
Washing devices
Farm machinery
Standards
Materials to DIN17223 Class C or BS1408 CR3. Dimensions conform to DIN2097 Grade 2. Oiled finish.