براغي رأس أسطوانية مقاس 1/4-28 × 1/2 بوصة | محرك مقبس سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد أسود حراريًا (100 / عبوة)

I needed a batch for a jig I was building, and these screws threaded in smoothly without any binding. The black oxide finish also gives them a nice, uniform look for precision work.

Installed these in a custom jig I’ve been building, and the nylon pellet really holds the threads tight without any loosening. The black oxide finish feels durable and the hex drive seated cleanly with my Allen key.

These hex socket screws fit perfectly into my jig fixtures, and the black oxide finish seems really durable against wear. The nylon pellet is a nice touch—keeps them secure without loosening during vibration from the machinery. Exactly what I needed for a precision assembly project.