براغي رأس أسطوانية مقاس 5/16-18 × 5/8" | محرك سداسي برأس منخفض | ملولبة بالكامل | فولاذ سبائكي بأكسيد أسود حراري (200 / عبوة)

The black oxide finish on these looks great and seems tough, I popped a few into a jig I'm building and the low head profile cleared the tight space perfectly. Threads were clean and they seated nice and snug without any binding.

Exactly the right size for some tooling fixtures I'm rebuilding, and the black oxide coating has held up well during assembly. The low head profile is perfect for tight clearance spots where standard cap screws won't fit.

Swapping out the old bolts on my jig was straightforward—these low head screws sat flush without getting in the way. The black oxide finish looks clean and hasn't shown any wear after a week of use. Exactly the right length for my precision assembly project.