براغي ذات رأس مقبس 9/16-18 × 3 بوصة | محرك سداسي المقبس | ملولبة جزئيًا | فولاذ سبائكي بأكسيد أسود حراري (25 / عبوة)

I needed partially threaded 3-inch bolts for a custom jig, and the 9/16-18 thread matched perfectly with my t-nuts. The black oxide finish was consistent across all 25 pieces, and the hex socket drive made installation a breeze.

The black oxide finish on these screws is holding up great in my machinery setup, and the hex socket drive makes installation a breeze. They threaded perfectly into my jig without any binding.

The threads cut clean and the hex socket seated perfectly on my jig fixture—no stripping even under heavy torque. For tooling work, the partially threaded length gives just the right grip where I need it.