براغي رأس أسطواني بمفتاح سداسي 5/8-18 × 6-1/2" | محرك سداسي | سن جزئي | فولاذ سبائكي بأكسيد أسود حراري (10/عبوة)

Used one to replace a worn pivot bolt on a heavy drill press table, and the partially threaded shaft gave just enough grip before the shoulder. The black oxide finish seems like it'll hold up better than the old zinc-plated one.

Pulling double duty as a jig bolt and a fixture clamp, these cap screws have held up perfectly under heavy use in my shop. The black oxide finish is holding its own against coolant splashes, and the hex socket takes an Allen key without stripping.

These thread right in smoothly—no binding at all, and the black oxide finish looks great on my jig setup. Exactly the length I needed for a tooling fixture.