براغي رأس أسطوانية #10-32 × 1-1/8 بوصة | محرك سداسي رأس زر | ملولبة بالكامل | فولاذ سبائكي أكسيد أسود حراري (300/عبوة)

Was using these to replace worn fasteners on a jig fixture, and the black oxide coating is holding up great against light rust in my damp shop. The hex socket drive seated perfectly with no stripping even after tightening to spec.

Had to swap out the old screws on a precision fixture, and these button heads fit the countersunk holes perfectly. The black oxide finish seems like it'll resist shop grime much better than the plain steel ones I used before.

Popped these on a small jig I was building, and the button head lets me get a hex key in at a tighter angle than a standard cap screw. The included depth on the socket feels consistent across the whole batch, no stripped heads so far.