1/2-13 × 1-3/4 بوصة براغي ذات غطاء مقبس | محرك مقبس سداسي | صناعة أمريكية | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

Finally, a hex cap screw that doesn't strip under torque—the alloy steel black oxide finish on these really holds up during jig assembly. I used them for a heavy-duty fixture, and the 1/2-13 thread engaged perfectly every time.

Had to tap these in for a machine guard repair, and the hex socket made driving effortless even in a tight spot. The black oxide finish also held up nicely against some light oil I had on my hands.

Threaded them into a jig plate last week and the black oxide finish wiped clean with a rag, no residue left behind. The hex socket drive held torque perfectly with no stripping, even at 60 ft-lbs. For the price per screw, these are a solid deal.