The ANSI B18.21.1 standard covers dimensional requirements, physical properties, and related test methods for Heavy Helical Spring-Lock Washers. These washers are designed to provide additional clamping force to prevent bolts or screws from loosening under vibration or shock.

Stainless Steel (304/316): Offers superior corrosion resistance and is suitable for moist or corrosive environments. The 316 grade has additional molybdenum, providing even better corrosion resistance, especially in marine applications.

Carbon Steel: Provides good strength and is the most common material for bolts. It may require additional surface treatments like galvanizing for increased corrosion resistance.

Alloy Steel: Offers enhanced strength and durability. It is often used in high-stress applications where high tensile strength is required.

Advantage:

Prevents loosening: ANSI B18.21.1 standard spring washers provide elastic clamping force through their helical shape, effectively preventing nuts or bolts from loosening. MULTIPLE SIZES: These washers are available in a variety of sizes from #0 to 3 inches to accommodate different bolts and screws.

Scope of Application

Machinery and equipment manufacturing: In machinery and equipment manufacturing, for fixing and adjusting machine parts such as bearings, gears and motors. Building and civil engineering: in building and civil engineering, for joining beams, columns and other structural components to provide stable and reliable connections. Automotive industry: In automotive manufacturing, for connecting automotive components such as chassis and body fixings.