30Pcs M6-1.0mm Black Zinc Plated Nylon Lock Nuts Inserted Hex Self Clinching Nuts

The nylon insert in these nuts squeezes down on the bolt threads instead of just resting loosely, which is the difference between a nut that backs off under vibration and one that doesn't. I threaded a batch onto various bolts and they engaged smoothly without any cross-threading or excess resistance. The black zinc coating is a nice detail, since it disappears against dark hardware instead of standing out like a bare nut would on patio furniture, tools, or outdoor equipment. Because the pack includes so many, there is no worry about running out mid-project or needing to ration them for smaller jobs. A dependable everyday fastener that does exactly what a lock nut should.

Worked great.

Grabbed this 30-pack to lock down the wobbly bolts on my hunting one-stick climber—those M6 threads were rattling loose after a few treks through rough Wisconsin woods. Threaded them on with a wrench in under 10 minutes; the nylon inserts gripped like a vice, no more slippage even after hauling 200 lbs up a 20-foot oak during bow season. Black zinc finish resisted rust from morning dew and mud, blending right into my camo setup without flashy shine. Pros: Self-clinching hex heads torqued easily by hand (up to 10 Nm without stripping); vibration-proof for bumpy ATV rides to the stand; overkill quantity means spares for stand repairs or buddies' gear. Steal at pennies per nut—way tougher than basic hardware store nylocks. Cons: None hit me—maybe the bag's a bit thin for pocket carry, but who needs that in the field? Verdict: If your saddle or one-stick's connections are dancing loose mid-climb, these are your fix. Saved my hunt (and maybe a fall); essential for any mobile tree hunter.

Good quality, black lock nuts.

Did the job I needed them to do, but they didn’t all seem to be the same size.

These fit the bolts I bought... They work well.

These were perfect for a patio set that was missing hardware.

I had some missing parts for some patio furniture and I needed hex-type lock nuts that would "blend in" to the original hardware. These are extremely well-made, have great fit and finish. Would buy again--highly recommend.

As described