5/16 Hi-Collar Helical Spring Lock Washer is sized to pair with the matching socket head cap screw where a regular split lock washer will not fit the counterbore. 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.
Engineers specify this washer for OEM small-machine assembly, production fixtures, tooling plates, and equipment panels when spring take-up is needed under a recessed socket head.
For hard-to-find socket screw accessories, Cold Headers can help line up the washer size with the matching cap screw requirement. The nominal size matches the screw size; do not size this washer from a broad outside-diameter assumption.
Technical Highlights
- Nominal Size: 5/16 (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.
