General Helical Spring Lock Washer Information ( PDF ):
How they work; materials; finishes; test procedures, Mil-Specs

Regular Helical Spring Lock Washers: Generate the tension needed to secure most commerical assemblies.

Regular Helical Spring Lock Washers

Heavy Helical Spring Lock Washers: Increased O. D., thickness and bearing area accept higher tightening torques for heavy duty applications. Shakeproof Heavy Section helical spring lock washers maintain tightness or tension in applications involving screws, bolts and nuts under high loads.

Heavy Helical Spring Lock Washers

Extra Duty (Extra Heavy) Helical Spring Lock Washers: With a further increase in O. D., thickness and bearing area, the Shakeproof Extra Duty, or Extra Heavy (EH) helical spring lockwasher absorbs exceptionally high torques and retains tension under heavy loads.

Extra Duty (Extra Heavy) Helical Spring Lock Washers

Hi-Collar Helical Spring Lock Washers: The smaller O. D. on the Shakeproof Hi-Collar helical spring lockwasher accommodates confined areas. The increased thickness sustains the washer's overal locking effectiveness. Recommended for use with socket head cap screws and where there are clearance limitations.

Hi-Collar Helical Spring Lock Washers

Light Helical Spring Lock Washers: With a segnificant reduction in washer thickeness and a slight reduction in O. D., the Shakeproof Light helical spring washer is often used with thin or fragile materials subject to lighter loads or in applications where head height clearance is limited.

Light Helical Spring Lock Washers

High Alloy Helical Spring Lock Washers: Shakeproof's High Alloy helical spring washers are manufactured from 4037 alloy steel. These washers are intended for use with with Grade 5 and Grade 8 bolts and nuts.

High Alloy Helical Spring Lock Washers

Double Coil Helical Spring Lock Washers: The Shakeproof Double Coil helical spring washer is used in soft joints, such as wooden pole line assemblies, that are subject to considerable expansion and contraction. The double coil provides the travel necessary to maintain effective clamping force in such assemblies.

Double Coil Helical Spring Lock Washers

Metric Helical Spring Lock Washers: These metric size washers meet DIN 1278B, DIN 7980 (Square Section), ASME B18.21.2M-1994 (Regular Section), ASME B18.21.2-1994 (Heavy Section) specifications.

Metric Helical Spring Lock Washers

National Track Washers: Shakeproof Track Washers were developed specifically to secure railroad track assemblies and withstand the intense shock and vibration produced by passing trains, Various styles meet and exceed American Railroad Engineering Association (AREA) specifications. They are also used to secure assemblies in structural applications and in railcar building and rebuilding.

National Track Washers

Lock Washers are the foundation on which WCL has been built. Close to
half a century of experience enables us to bring you one of the most
comprehensive and diverse offering of quality tooth and helical spring
lock washers available anywhere - from low-cost, highly competitive
commodity washers to high performance Shakeproof products. For the right
fastener at the right price, it's WCL!