براغي رأس مقبس 1-8 × 2-1/2 بوصة | محرك سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد أسود حراري (10/عبوة)

The nylon pellet locking feature held these screws securely in place on my precision assembly without any loosening, even after repeated adjustments. The black oxide finish looks clean and professional too.

The hex socket drive made installation into my jig plate effortless, and the nylon pellet adds just the right amount of grip for vibration-prone machinery. These screws feel robust and the black oxide finish looks great on my tooling setup.

These black oxide screws fit perfectly into my jig's threaded holes, and the nylon pellet really locks them tight against vibration. The hex socket drove smoothly with no stripping, even at higher torque. Exactly what I needed for a solid machine fixture.