براغي ذات رأس مقبس 5/16-18 × 1-1/4" | محرك مقبس سداسي | رقعة نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد أسود حراريًا (100/عبوة)

Needed these for a small tooling project I was working on, and the nylon patch is a nice touch—holds them in place during assembly without needing a separate lock washer. The black oxide finish looks clean and professional.

Just finished rebuilding a jig fixture and these 5/16-18s with the nylon patch held their torque beautifully—no loosening after a full day of vibration. The black oxide finish looks clean and the hex sockets were cut sharp, so my Allen wrench seated perfectly every time. For the price per hundred, y

I’ve been using these in jigs and fixtures, and the hex socket drive makes tightening them in tight spots easy. The black oxide coating holds up well against oil in my shop.