HOLO-KROME 60148 براغي غطاء المقبس 5/8-11 X 2 بوصة | رأس مسطح سداسي | فولاذ سبائك أكسيد أسود حراري (25 / عبوة)

Installing these into a jig frame, the hex socket drove smoothly without stripping, and the threads cut cleanly into the alloy steel plate. Flat head sat flush as expected, giving the assembly a professional, low-profile look.

The thermal black oxide finish is exactly what I wanted for my jig builds—it resists fingerprints and doesn't flash rust like the plain steel ones I used before. Threads were clean and started by hand on the first try, and the flat head seats nice and flush.

Needed a replacement set for a jig fixture I'm rebuilding and these cap screws fit perfectly. The black oxide coating seems durable and the hex drive seated nicely without stripping.