براغي ذات رأس أسطواني 1/2-13 × 1-1/2 بوصة | محرك سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

The threads on these are perfectly cut—they seated into my jig plate without any wobble or binding. The nylon pellet is a nice touch, keeping the socket drive from backing out under vibration. Pack of 50 should last me a good while.

The nylon pellet locking feature really holds these screws tight in my jig setup, which saved me from constant re-torquing during a long machining run. They threaded cleanly into tapped 1/2-13 holes without any binding, and the black oxide finish looks professional on the fixture.

The hex socket drive made installation a breeze with my T-handle wrench, and the nylon pellet locking feature gives me real confidence these won't back out under vibration. Perfect fit for the jig I'm building.