7/8-9 X 3-1/2" براغي ذات رأس مقبس | محرك سداسي | رقعة نايلون | ملولبة جزئيًا | فولاذ سبائكي مؤكسد أسود حراريًا (10 / عبوة)

The nylon patch on these screws held fast during a recent tooling adjustment, which saved me from having to use threadlocker. The black oxide finish looks clean and professional on my machine fixture. They threaded smoothly into tapped holes without any binding.

I’ve used these on a jig that sees constant clamping pressure, and the thermal black oxide coating has held up without any rust or chipping so far. The partial threads give just the right grip depth for my fixture plate, and the hex socket drive made tightening them in tight spots a breeze. This is

The nylon patch on these is a nice touch—they held snugly in my jig without any need for threadlocker. The black oxide finish looks clean and the partially threaded length worked perfectly for my tooling setup.