براغي رأس مقبس مقاس 1/4-28 × 7/8 بوصة | محرك مقبس سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد حراري أسود (100/عبوة)

The nylon pellet locking feature is a nice touch for these heat-treated set screws—they hold their position on my jig even under vibration. Packed sixty deep in one bag, and every one has a clean, sharp thread. Exactly what I needed for tooling adjustments.

These screws fit my precision assembly fixture perfectly, the hex socket drove cleanly without stripping. That nylon pellet adds just the right amount of grip to hold adjustments in place.

Used these for a jig I was building, and the nylon pellet locking feature is a nice touch—holds adjustment really well without backing out. The black oxide finish looks clean and professional on the assembly too.