براغي رأس مقبس 7/16-20 X 1-1/2" | محرك مقبس سداسي | رقعة نايلون | ملولبة بالكامل | سبيكة فولاذية أكسيد أسود حراري (100 / عبوة)

I was worried about stripping these during assembly, but the hex socket drive gripped my wrench perfectly and the black oxide finish looks like it'll hold up well. Nice to find grade-appropriate fasteners that seat flush first try.

I needed some strong screws for a jig I was building, and these 7/16-20 socket cap screws with the hex drive seated perfectly without stripping. The black oxide finish looks clean and should resist rust well in my shop.

Installed these in a precision fixture and the nylon patch held them tight without any thread locker. The black oxide finish looks clean and the hex drive seated perfectly with my Allen key. Exactly what I needed for tooling work.