5/16in High Alloy Thru-Hardened Lock Washer Yellow Zinc

This coiled, high alloy split circular washer applies a greater bolt tension per unit of applied torque than a thru-hardened flat washer. Providing a more uniform load distribution, it resists loosening caused by vibration and corrosion. It's the preferred lock washer for use with Grade 8 bolts and nuts. LW516HA