5/16-18 × 5/8" براغي غطاء مقبس | محرك سداسي المقبس | حبيبات نايلون | كامل الخيوط | سبيكة فولاذ أسود حراري (100 / عبوة)

These screws worked perfectly for a jig I was building — the black oxide coating gives them a nice finished look and seems durable. The hex socket made installation quick with no stripped heads.

The nylon pellet locking feature is a lifesaver—these screws stay put even on vibrating machinery. The black oxide finish looks good and seems to resist rust so far. Exactly what I needed for my jig setup.

The hex socket drive on these screws gripped my driver bit perfectly on a jig build, zero stripping or cam-out. The nylon pellet locked the threads down tight, and the black oxide coating slid through the fixture cleanly. Exactly what I needed for precision assembly work.