1-1/2-12 × 4-1/2" براغي رأس مقبس سداسي | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي مع أكسيد أسود حراري

I was a little worried about getting the right fit for a custom fixture, but the hex socket drive made installation straightforward. The black oxide finish on these screws looks professional and seems like it'll resist wear well in my shop.

Tightened these down for a jig build and the hex drive bit seated deep without any wobble. The 4-1/2" length gave me just enough reach through a thick fixture plate.

The hex socket drive grips perfectly, even with oily fingers, and the black oxide finish looks professional on my jig. These fully threaded 4-1/2" screws threaded cleanly into tapped holes without binding, exactly what I needed for a machinery repair.