HOLO-KROME 72152 3/8-16 X 5/8" براغي غطاء بمقبس | محرك مقبس سداسي | سبيكة فولاذ معالجة حرارياً بأكسيد أسود (100 / عبوة)

The hex socket drive on these screws really locks into the Allen wrench without slipping, which makes a huge difference when I'm tightening them in tight spots. The black oxide coating seems like it will hold up well against minor rust in my shop.

Third box of these I've ordered for our shop fixtures, and the black oxide finish holds up way better than plain zinc ones I've tried. The hex socket drive seats perfectly on my Allen keys every time, zero stripping on the first hundred or so.

I’ve used these in a few jigs and they seat perfectly without any binding, and the hex drive grabs cleanly every time. The thermal black oxide coating has a nice consistent look across all 100 pieces, which is more than I can say for some bulk fasteners I’ve bought. Exactly what I needed for precisi