براغي غطاء مقبس 1/4-28 × 1 بوصة | رأس زر بمقبس سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي أسود حراري (100/عبوة)

I swapped these into a jig I’m building and the black oxide coating feels durable and adds a nice grip. The hex socket drive lets me torque them down evenly without stripping, which is exactly what I needed for precision assemblies.

The nylon pellet in these kept the threads locked tight on my jig table — not a single one backed out after a full week of vibration. They’re fully threaded too, which gave me perfect engagement in a tapped hole that was slightly deeper than the screw length.

The hex socket drive made installation a breeze with my allen wrench, and the black oxide finish looks clean on my tooling jig. The nylon pellet adds a nice touch of grip that I wasn't expecting.