براغي رأس مقبس 7/8-9 × 2-1/4 بوصة | محرك مقبس سداسي | صنع في الولايات المتحدة | فولاذ سبائكي أكسيد أسود حراري (10 / عبوة)

The threads cut cleanly into the jig I'm building, and the black oxide finish looks professionally finished. Exactly the grip I needed for a tight tolerance assembly.

Used a full pack on a custom jig for a production run and every one seated cleanly without a single stripped head. The black oxide finish is even and didn't flake when I torqued them down. These are the kind of fasteners you don't have to think twice about.

Got these for a fixture plate on the mill and the hex socket drive seated perfectly with zero wobble. The thermal black oxide finish feels slick and should hold up well in the shop, plus the 7/8-9 threads are cut true. Four out of ten screws went in without a single hitch, and that’s enough for me t