Metallics JSLW1 Washers 1 Split Lock SS (Jar 50)

The JSLW1 is a 1 inch split lock washer, so it goes over 1 inch diameter bolts and threaded rod. For anything smaller you need the matching smaller size in the split lock range, not this one.

Stainless steel. That matters for outdoor strut runs, rooftop equipment, wet rooms and coastal sites where a zinc plated washer will bloom rust and seize the nut. Pair them with stainless bolts and nuts to avoid mixing metals at the joint.

They do different jobs and are often used together. A split lock washer, which is what the JSLW1 is, bites into the nut and the mating surface to resist loosening from vibration. A flat washer spreads load and protects a soft or slotted surface. On vibration prone gear such as motors, transformers and equipment anchors, stack the flat washer against the material and the split lock under the nut.

Yes, it is built to the ANSI dimensional standard for a 1 inch split lock washer, so inside diameter, outside diameter and thickness match other ANSI spec 1 inch lock washers already on your shelf. Mixed brands on the same job will stack and torque the same.

These are general purpose stainless fasteners for electrical work, stocked as electrical supplies, and the stainless material holds up in damp and outdoor enclosures. They are mechanical hardware, not a listed bonding device, so where a code required ground connection calls for a specific listed lug or bonding washer, use that part and treat the JSLW1 as the companion lock washer on the bolt.