براغي رأس مقبس #4-40 × 3/4 بوصة | محرك سداسي منخفض الرأس | فولاذ سبائكي مؤكسد أسود حراريًا (100/عبوة)

The black oxide finish on these #4-40 screws makes them blend perfectly into my jig, and the hex drive seated firmly without cam-out. Exactly what I needed for a tight assembly where low head height was critical.

Needed some low-profile fasteners for a tight clearance on a tooling plate, and these #4-40 screws fit perfectly. The hex socket drive made installation easy with a standard Allen key, and the black oxide finish looks clean. Exactly what I was after.

Used a few of these to mount a jig fixture on my mill table and the low head profile let me get a wrench in a tight spot. The black oxide finish seems durable and they threaded into tapped holes without any binding.