A lock nut resists loosening under vibrations and torque. Two-way reversible lock nuts can be installed in either orientation (top up, top down). A nylon insert has a nylon collar insert that resists turning. Keps has an external tooth washer that is often loose on the plain shank of the fastener. Stover is installed one-way…top up. Flex-loc is a one-piece nut that has an expanding slotted top when tightened. Ideal for securing parts in engines and suspension systems.
- Material: Available in steel, or stainless steel
- Size range: From 4-40 to 1/4" to 1 1/2" diameter, metric to custom
- Finishes: plain or plated
- Thread: Coarse and fine, American Standard, Metric, Custom and Specialty