1 Hi-Collar Helical Spring Lock Washer is a hi-collar helical spring lock washer for socket head cap screw counterbores and compact recessed joints. The washer is not a substitute for joint design review, but it is the washer style commonly paired with recessed socket head cap screws. For use with 1960 Series Socket Head Cap Screws, especially where a standard split washer is too wide.

Use this style for motor mounts, pump mounts, equipment bases, and machinery tie-down points when a standard split lock washer has too much outside diameter for the counterbore.

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: 1 (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.