HOLO-KROME 08042 براغي كتف مقبس 3/8 × 1 بوصة | رأس مقبس | محرك مقبس | فولاذ سبائكي مؤكسد أسود حراري (25 / عبوة)

Was a bit worried about fitment on my mill's guide rods, but these slid right into place with zero wobble. The black oxide finish handled a quick oil wipe-down without a mark.

Used a couple of these as pivot points for a jig I built, and the precision ground shoulder made alignment dead simple. The black oxide finish held up well even after a bit of grease and handling.

The hex socket drive made installation with an Allen key a breeze, and the thermal black oxide finish looks clean and professional on my jig. Exactly the precision-ground shoulder I needed for a smooth bearing surface.