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

I needed these for a quick jig setup and the nylon pellet locking feature works great—no loosening under vibration. The black oxide finish also gives them a nice, consistent look against my steel fixtures.

These hold perfectly in my milling fixture jig, and the black oxide finish looks great against the steel plate. The nylon pellet is a nice touch for locking them in place without needing Loctite.

I needed a batch of screws for jig assembly, and the black oxide finish on these is really uniform and durable. They threaded cleanly into my fixture plates with no jamming, and the nylon pellet locking feature holds solid even under vibration.