براغي رأس مقبس 1/4-28 × 3/4 بوصة | محرك مقبس سداسي | حبيبات نايلون | ملولبة بالكامل | سبيكة فولاذية أكسيد أسود حراري (100 / عبوة)

The black oxide finish took a bit of handling in my tooling setup without any smudging, and the nylon pellet held firm under repeated adjustments. Threads were clean and seated smoothly into the jig plate, no binding or galling. Solid pack for the price, exactly what precision assembly needs.

Used a full bag of these on a jig fixture and every single one threaded clean without a single stripped socket. The 3/4" length was spot-on for my application, and the black oxide coating held up fine under some light coolant exposure.

The hex socket drive made tightening these into my jig a breeze, and the black oxide finish looks clean and professional. Exactly the right size for securing a small fixture on my mill table, no stripped heads or wobble.