براغي رأس كبس مقبس #8-32 × 1-1/4 بوصة | محرك مقبس سداسي | رقعة نايلون | خيط جزئي | فولاذ سبيكة أسود حراري (200/عبوة)

The nylon patch on the threads is a godsend for anything that vibrates—I’ve used these on a couple of precision assemblies and haven’t had a single one back out yet. The black oxide finish also looks sharp against the aluminum I’m mounting.

Installing these on a jig I’m building, the nylon patch really held the screws in place during trial fits, saving me from chasing them across the bench. The black oxide finish also looks much more durable than plain steel.

The hex socket drive made installation a breeze with my Allen wrench, and the nylon patch holds tight against vibration. These black oxide screws look great on my jig and feel sturdy enough for repeated use.