براغي مقبس نقطة كوب مخددة مقاس #8-36 × 1/2 بوصة | فولاذ سبائكي (100 / عبوة)

Finally, a set screw that actually holds tight in my lathe's tool post without slipping. The knurled cup point grips like crazy, and the hex socket makes adjustments a breeze.

The hex drive makes it easy to really torque these down, and the knurled cup point grips the shaft impressively tight. I've used a dozen so far on a small motor mount, and not one has loosened up.

I was pleasantly surprised at how precisely these screws fit into my threaded holes; the hex socket drive made adjustments easy even in cramped spots. The alloy steel feels tough enough to handle repeated use without stripping, which is exactly what I needed for a stubborn jig setup.