Built for custom knife makers, gunsmiths, and precision craftsmen, this premium carbon stainless steel leaf spring material delivers the strength, resilience, and long-lasting performance required for demanding applications. Heat treated to 40–45 RC, it provides consistent spring tension and dependable action while resisting the fatigue that can occur with work-hardened 301 or 302 stainless steel.
Engineered to meet the expectations of professional automatic knife makers, this spring stock is ideal for creating or replacing leaf springs in custom automatic knives, firearm components, and other high-tension mechanical assemblies. Its precision dimensions make it easy to machine, grind, and shape to your exact specifications while maintaining the durability needed for repeated use.
Available in multiple lengths, this high-performance spring material gives you the flexibility to choose the size that best fits your project while delivering the same premium quality and reliable performance across every variation.
KK Swatch Size
large
Product Type:
Leaf Spring Material
Material:
Carbon Stainless Steel
Hardness:
40–45 RC
Width:
0.160 inches (4.06 mm)
Thickness:
0.070 inches (1.78 mm)
Length:
Select from Options Above
