Product Overview
Century Spring W-40CS 302/304 Stainless Helical Compression Spring
Condition
New condition. Clean passivated stainless steel wire with uniform pitch and closed, ground ends. Sourced from surplus inventory.
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
The Century Spring Corp. W-40CS is an industrial-grade helical compression spring engineered from 302/304 stainless steel for corrosion resistance and consistent mechanical deflection. Designed with an outer diameter of 0.453 inches and a free length of 2.63 inches, it provides linear resistance under axial loading with a rated spring rate of 5.1 pounds per inch. Closed and ground ends ensure square seating and uniform load transfer in mechanical assemblies, fixturing, and precision return mechanisms.
Key Features
- 302/304 stainless steel wire construction for corrosion and wear resistance
- Closed and ground ends provide square seating and balanced load distribution
- 0.453 in (11.51 mm) outer diameter and 0.359 in (9.12 mm) inner diameter
- 0.047 in (1.19 mm) wire diameter with 20 active coils
- 2.63 in (66.80 mm) free length with a solid height of 0.940 in (23.88 mm)
- 5.1 lbs/in spring rate with a maximum suggested load of 8.2 lbf
Applications
- Precision return springs in mechanical linkages, valves, and switch assemblies
- Fixturing, prototyping, and tensioning mechanisms on maintenance benches
- Custom robotics, automation actuators, and laboratory test rigs
- Hobbyist model building, tool rebuilds, and custom fabrication projects
Frequently Asked Questions
What material is used for the W-40CS spring?
This spring is manufactured from 302/304 stainless steel, offering high tensile strength and resistance to moisture and chemical corrosion.
Are the ends of this spring ground flat?
Yes. The spring features closed and ground ends, allowing it to sit flat and square against mating surfaces without buckling under axial loads.
Why buy individual springs here instead of a bulk contractor pack?
Standard distributors often require large minimum order quantities or high single-unit packaging fees. Buying individual pieces gives you the exact spring rate and dimensions you need for repairs or prototypes without paying for surplus inventory you will not use. Shipping is an $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Clean stainless wire, square ground ends, and honest linear deflection - exactly what keeps a mechanism cycling smoothly on the bench.
