براغي هولوكروم 86035 M6-1 × 25 مم برأس أسطواني | محرك سداسي برأس زر | سبيكة فولاذية بأكسيد حراري أسود (100 / عبوة)

The black oxide finish on these screws hasn't chipped at all after tightening and loosening them a few times on a quick tooling setup, which is more than I can say for cheaper zinc-plated ones. The button heads sit flush enough for my precision fixture and the M6 threads ran clean into the tapped ho

I’ve been using these on a jig build, and the black oxide finish really resists scuffs during assembly. The button head sits flush enough without needing extra countersinking.

Needed a handful for a precision assembly project at work, and the black oxide finish on these M6 screws held up perfectly against a little oil and handling. The hex socket drive seated cleanly and the 25mm length was just right for my application.