براغي غطاء مقبس HOLO-KROME 77540 1/2-20 X 4 بوصة | محرك مقبس سداسي | فولاد سبائكي مؤكسد حراري أسود (25 / عبوة)

Installed these in my drill jig and the 1/2-20 threading was clean and tight right out of the box, no burs or binding. They feel really solid for tooling work, and the black oxide seems durable so far. Exactly what I needed for the price.

Was replacing a stripped bolt on my milling jig and these threaded in smooth with no binding. The 1/2-20 fit perfect and the hex socket drive gave me good torque control.

The black oxide finish wiped clean easily and the threads cut smooth without any binding, which made mounting my tooling fixture a breeze. I’ve torqued them down hard and they’ve held so far, so I’m grabbing another pack for the next project.