براغي مقبس #4-40 × 5/8 بوصة بنقطة كوب مخددة | فولاذ سبائكي (100/عبوة)

The knurled grip on these #4-40 set screws made them easy to handle even with oily fingers, and the cup point bit perfectly into my shaft for a solid lock. Came in a nice organized package of 100, exactly what I needed for a batch of repairs.

I needed some small set screws for a repair on a tight assembly, and these alloy steel ones fit perfectly with the hex drive. The threads are clean and the knurled cup point held firm under moderate torque.

The knurled cup point really grips well in my small adjustment applications—no slipping at all. These #4-40 screws are exactly the right size for a tight machine setup I’ve been working on, and the hex drive makes them easy to torque down.