براغي هولو-كروم 730002220 1/2-20 × 3/4" برأس مقبس | محرك مقبس سداسي | سبائك فولاذية بأكسيد حراري أسود (50/عبوة)

The black oxide finish wiped clean easily and hasn’t shown a hint of rust after a week on my jig. The hex socket drive seated perfectly with my Allen key, and all 50 threads ran smooth without any binding.

Had to swap out a few stripped bolts on a milling fixture and these threaded in smooth with no binding. The black oxide finish feels sturdy and should hold up well in the shop environment.

Just finished a small jig rebuild and these cap screws fit perfectly in the tapped holes—the hex socket drive made tightening them a breeze. The alloy steel feels solid, and the black oxide finish should hold up well in my shop environment.