#12 Hi-Collar Helical Spring Lock Washer is the companion washer for a matching nominal-size socket head cap screw in machinery and fixture work. The taller section and smaller outside diameter distinguish it from a standard split washer while maintaining spring action under the cap screw head. Pair this washer with the same nominal socket head cap screw size for counterbored assemblies.

It is useful in motor mounts, pump mounts, equipment bases, and machinery tie-down points, with the helical ring compressing as the cap screw seats. For a locking approach built into the screw itself, compare 1960 Series Alloy SHCS with Nylon Insert. Review 18-8 Stainless Socket Head Cap Screws when the screw material requirement changes.

Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size washer and cap screw sourcing. Before ordering, compare the print callout to the nominal washer size and the matching socket head cap screw.

Technical Highlights

• Nominal Size: #12 (matches screw size)
• Style: Hi-Collar (reduced OD, increased section vs. standard split washer)
• Type: Helical Spring Lock Washer
• Fits: Socket head cap screw counterbores
• Material: Carbon Steel
• Dimensional Standard: ASME B18.21.1

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.