براغي تثبيت برأس مقبس نقطة كأس مخددة 5/16-24 × 5/8 بوصة | سبائك فولاذية مطلية بالزنك (100/عبوة)

The knurled cup point really bites into the shaft, and the zinc plating looks clean and even across all 100 screws. I used them to secure a sprocket on a small engine build, and the hex socket drive made installation in that cramped spot much easier than I expected.

I was a bit worried these would be too short, but the 5/16-24 thread grabbed perfectly in my new fixture. The knurled cup point really helps them stay seated while you get the hex driver in there.

These set screws grabbed the threads perfectly on my first try, and that hex socket drive made tightening them in a tight engine bay bracket a breeze. The zinc plating looks clean and should resist rust well on my project.