براغي تثبيت برأس نقطة كوب مقاس 1/2-13 × 7/8" | فولاذ سبائكي مطلي بالزنك (100 / عبوة)

The hex socket drive made tightening these into a tight spot on my milling machine so much easier than using a standard wrench. The cup point bit into the shaft firmly without slipping, and the zinc plating looks clean and uniform across all 100 pieces.

Installed these on a drive shaft yesterday and the hex socket let me torque them down even in a cramped spot. The zinc plating looks clean and should keep them from rusting in my shop.

The cup point really bites into the shaft when I torqued it down, and the zinc plating looks clean out of the bag. All 100 screws had consistent threads, which saved me a ton of sorting time.