براغي مقبس كوب نقطة مخددة 1/4-20 × 3/8 بوصة | فولاذ سبائكي (1000 / عبوة)

The knurled cup point on these set screws really bites into the shaft to prevent slipping. I'm glad I bought the full thousand-count box, because they're perfect for securing collars and gears on several projects.

I used these to secure a pulley to a motor shaft, and the socket drive made installation straightforward with a hex key. The knurling on the cup point adds extra grip for holding the part in place. A solid choice for light mechanical assemblies at this quantity.

The knurled cup points really bite into the shaft without slipping, which saved me from having to re-tighten after assembly. I went through all 1000 screws on a single machine build, and every one seated cleanly without any stripped threads.