M4 Nyloc Nylon-Insert Lock Nuts – 316 Stainless Steel – Pack of 8

You bolt something together, vibrate it a bit, and the nut has backed off. You're back on a ladder or under a bench at 7 am, chasing a loose M4 that shouldn't have moved.

Nyloc nuts stop that. The nylon insert grips the thread so the nut stays put under vibration. And because these are sealed in a pack of eight, you know every one is M4, 316-grade stainless steel — no 304 sneaking in, no M5 hiding in the lot.

Thread them on, tighten, and forget they're there. Eight in, eight out. Sorted

• Nylon-insert (Nyloc) design locks the nut in place under vibration
• 316-grade stainless steel body — resists rust in wet and coastal conditions
• M4 thread for standard small-diameter bolt fitment
• Sealed pack of 8 — exact count, confirmed grade on the label
• Better per-unit value than pulling singles from a mixed tray