The 30Pcs M3 Hex Lock Nuts Nylon Insert Stainless Steel 304 Self Locking Nuts Metric Hardware 0.5mm Pitch Rock Solid Heavy Duty Corrosion Resistant Fasteners For Car Mods And Builds

30 Pcs M3 304 Stainless Steel Nylon Lock Nuts
✔️ M3 nuts, 0.5mm/0.02-in pitch, 4mm/0.157-in height, 5.5mm/0.217-in hex

You get a handy 30-piece pack of M3 nylon insert lock nuts made from durable 304 stainless steel. These self-locking fasteners grip screws tight to stop them from working loose on vibrating car mods, furniture builds, or appliance repairs.

✅ Nylon collar bites into bolt threads to jam loose hardware
✅ 304 stainless steel resists corrosion, rust, and daily wear
✅ Burr-free flat surfaces slide smoothly onto clean screw shafts
✅ Works fine with standard hand tools and socket wrench sets
✅ Useful for securing heavy machinery brackets or DIY metal projects

💡 How do nylon insert lock nuts maintain tension without frequent retightening?
The internal nylon ring creates radial compression that clamps firmly around the screw threads.
- Friction from the nylon deforms slightly to lock the nut in place under load.
- Backlash and vibration cannot overcome this grip, keeping your assembly secure during operation.
- Stainless steel versions resist environmental damage while preserving locking strength over time.