1/2-13 X 4" براغي ذات رأس مقبس | رأس منخفض محرك مقبس سداسي | فولاد سبائكي أكسيد أسود حراري (100/عبوة)

The hex socket drive grabbed my 3/8" ratchet perfectly without any slippage, and the black oxide coating made them easy to handle during assembly. I used these on a heavy-duty jig frame, and all 100 screws threaded smoothly with no binding issues.

The black oxide finish on these 4-inch screws looks professional and held up well during assembly without any flaking. I used them for a custom jig, and the hex drive seated perfectly with no cam-out.

I needed a longer cap screw for a new jig build, and these 4-inch low head bolts cleared the tight space perfectly. The black oxide finish looks uniform and should resist corrosion well in my shop.