1/2-13 × 3" براغي مقبس بنقطة مخددة | فولاذ سبائك (25/عبوة)

The hex socket drive made it easy to tighten these in a cramped spot under my milling machine table. The knurled cup point tip held firm without slipping, even at higher torque settings.

I needed a solid set screw for a stubborn shaft repair, and the hex socket drive made it easy to get that high torque without stripping the head. All 25 pieces matched the spec perfectly, and the alloy steel feels tough enough for repeated adjustments.

The knurled cup point really bites into the shaft—I tightened one down on a pulley and it held without slipping even under vibration. The hex socket drive made it easy to get torque in a spot where I couldn't fit a wrench. Solid little package for the price.