250 Pack 5/16-18 Grade 8 Nylon Insert Lock Nuts - Coarse Thread With Yellow Zinc Finish

Got a project that needs some serious holding power?

This bulk pack of 250 lock nuts has you covered.

They're 5/16-18 coarse thread and made from strong Grade 8 steel, so they can take a beating.

The nylon insert inside grips the bolt threads tight, meaning they won't vibrate loose—perfect for automotive, machinery, or anywhere things shake.

They've also got a yellow zinc finish, which gives them a bit of corrosion resistance and that classic gold-ish look.

Each one has an external hex drive, so you can easily wrench them down.

They're brand new from Rivercity Fastener & Supply.

Whether you're building something from scratch or just restocking your shop, having a whole box of these on hand is always a good idea.