HOLO-KROME 07042 Porcas Allen 5/8-18 | Acionamento hexagonal de 12 pontos | Aço ligado com óxido negro térmico (50/emb.)

I needed a fastener that wouldn't stick out past the surface, and these internal wrenching nuts fit the bill perfectly. The knurled body gives you a solid grip during installation, and the 12-point socket drive makes tightening with a hex key super easy even in tight spots.

The 12-point socket drive means I can get a hex key in from the top even in tight spots where a regular wrench won't go. These came out of the package with a consistent black oxide finish and no burrs, and the knurling gives a solid grip for starting them by hand. Exactly what I needed for the job.

I needed a nut that could be driven from the top with a hex key in a tight spot, and the 12-point socket drive on these works perfectly. They fit my application without any issues and the black oxide finish looks clean.