براغي رأس مقبس #3-56 × 3/16 بوصة | رأس مسطح مع محرك سداسي المقبس | ملولبة بالكامل | فولاذ سبائكي مع أكسيد أسود حراري (200 / عبوة)

The black oxide finish on these screws looks clean and holds up well during assembly, and the hex socket drive makes seating them in tight spots much easier than a slot head. I’ve used a handful already on a tooling fixture and the threads engage smoothly without any binding.

The black oxide coating on these #3-56 screws gives them a nice, uniform finish that resists scratching during assembly. They seated perfectly into the threaded holes on my precision fixture without any binding or stripping. Exactly what I needed for this small-scale tooling project.

Installed a few of these in a jig yesterday and the black oxide coating gave them a nice, consistent grip without any binding. The flat head sits perfectly flush, exactly what I needed for a tight clearance assembly.