براغي رأس مقبس 3/8-24 × 1-1/2 بوصة | محرك سداسي | حبيبة نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد أسود حراري (100/عبوة)

The black oxide finish on these screws has held up perfectly through a week of daily use in my tooling setup, and the nylon pellet keeps them locked in place even under vibration. Threads cut clean and seated fully without any binding. Exactly what I needed for precision assemblies.

Used a dozen of these to secure a jig base on my mill table and the hex drive seated perfectly without any stripping. Nylon pellet held tight after a few adjustments, really glad I bought the 100 pack.

I needed a batch of quality screws for building a new jig, and these black oxide ones fit the bill perfectly. The hex sockets are crisp and accept the driver with zero wobble, and the nylon pellet does a great job at holding them in place.