براغي رأس مقبس 1/2-20 × 1-1/4 بوصة | محرك سداسي | صنع في الولايات المتحدة | فولاذ سبائكي مع أكسيد أسود حراري (500 / عبوة)

Installed a dozen of these in a jig yesterday and the hex socket drive engaged perfectly with no stripping. The black oxide finish has a nice uniform look and they threaded in smooth from the first turn.

Needed a hundred for a jig rebuild and these showed up with a consistent, clean thread cut and the black oxide finish didn’t chip during install. Held torque perfectly in a drill fixture I set up.

Just finished a tooling fixture with these and the hex socket drive seated perfectly every time, no wobble. The thermal black oxide finish gives them a nice uniform grip during assembly. Solid batch of 500 with no duds in the box.