3/4-10 × 4-1/2" براغي رأس مقبس | رأس مسطح مع مقبس سداسي | ملولبة جزئيًا | فولاذ سبائكي مع أكسيد أسود حراري (10 / عبوة)

I needed a partially threaded screw for a drill jig build, and these 4-1/2" black oxide ones held up perfectly. The flat head sits flush without chewing up the surface.

The hex socket drive made installation straightforward with my Allen wrench, and the partially threaded design let me clamp down a thick jig without any extra hardware. These bolts feel solid in hand, and the black oxide coating hasn't shown a single scratch after a week of shop use.

The black oxide finish looks proper on the machine I bolted these into, and the hex socket drive grabbed cleanly without any stripping. The partial threading gave me just the right grip for a 4-1/2" application where I needed some play above the threads.