1 1/8 Hi-Collar Helical Spring Lock Washer gives a socket screw assembly a reduced-OD lock washer made for the space under a socket head cap screw. The split helical ring compresses as the screw seats, keeping spring take-up under the head and helping resist loosening under vibration. Pairs with our 1960 Series Alloy Steel Socket Head Cap Screws in the same nominal size.

It is useful in retrofit of vibrating equipment, service repairs, compact machinery, and field replacements, with the helical ring compressing as the cap screw seats. Plain carbon steel should be kept dry and oiled; ask about stainless washers as a non-catalog item when exposure matters. Compare Alloy Steel Socket Head Cap Screws when building a complete inch socket-screw order.

Cold Headers helps maintenance teams and distributors match the small companion parts that keep socket screw orders complete. Review the cap screw size, counterbore diameter, joint stack-up, and washer style before substituting a standard split washer.

Technical Highlights

• Nominal Size: 1 1/8 (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.