Product Overview
0.125 Inch OD x 1.25 Inch Long Stainless Steel Extension Spring
Condition
New old stock. Unused inventory with clean wire surfaces and intact crossover end loops.
Same or next business day shipping from our Idaho warehouse. Reliable parts since 1999. Honest pricing, no nonsense.
We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
Century Spring S-508CS is a miniature precision extension spring fabricated from passivated 302/304 stainless steel. It features inline crossover machine hooks on both ends to deliver dependable mechanical tension in compact mechanisms and delicate assemblies.
Key Features
- Material: Passivated 302/304 stainless steel
- Outside Diameter: 0.125 in (3.18 mm)
- Free Length: 1.25 in (31.8 mm)
- Wire Diameter: 0.015 in (0.38 mm)
- Spring Rate: 0.67 lbs/in
- Maximum Load: 0.99 lbf (4.4 N)
- End Type: Machine hook / crossover loop
Applications
- Precision mechanism return springs in small electromechanical devices and switches
- Tensioning linkages in laboratory instruments, optical mounts, and micro-actuators
- Creative prototyping, hobby robotics, scale modeling, and custom benchtop builds
Frequently Asked Questions
What material is this spring made from?
This spring is manufactured from 302/304 stainless steel with a passivated finish for corrosion resistance in mechanical and electronic assemblies.
What type of end hooks are on this unit?
It features machine hook (crossover loop) ends designed to anchor over standard pins, screws, or linkage tabs.
Can I buy just the exact quantity I need for my repair or prototype?
Yes. You can purchase the exact piece count required without meeting factory bulk pack minimums. Shipping is a flat $8 rate, orders over $28 ship free, and packages leave our Idaho warehouse the same or next business day.
Small mechanical springs are the quiet workhorses of precision engineering. Hook this stainless extension spring into your mechanism and let steady tension do the rest.
