براغي رأس سوكيت مقاس 3/8-24 × 1 بوصة | محرك سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي أسود حراري مؤكسد (100/عبوة)

I needed some quality fasteners for a jig build and these came perfectly threaded with a smooth hex drive that gripped nicely. The black oxide coating held up well against minor scuffs during installation.

These arrived with a nice even coating and the threads are clean, no burrs. Used them to rebuild a fixture at work and every one seated perfectly with the nylon pellet holding tight.

Used a handful of these for securing a jig on my mill, and the black oxide finish held up great against coolant. The hex socket engagement felt precise, and the nylon pellet did its job locking them in place without needing thread locker.