براغي رأس مقبس 5/8-11 × 4 بوصة | رأس مسطح بمحرك سداسي | ملولبة جزئيًا | فولاذ سبائكي مع أكسيد أسود حراري (10/عبوة)

The black oxide finish on these is what sold me—they slide into the fixture without galling, and the partial threading keeps alignment solid under load. I've used them on two jigs this week and the hex socket drive hasn't stripped once.

Grabbed a pack for a heavy-duty fixture jig I’m building, and the hex socket drive made torquing them down a breeze. The black oxide coating seems durable and hasn’t chipped during assembly. Really solid fit for the price.

I've been using these 5/8-11 x 4" screws for a jig fixture, and the hex socket drive makes installation quick without stripping. The alloy steel feels solid and the thermal black oxide finish resists rust even in humid shop conditions.