براغي هولوكروم 76376 M12-1.75 × 45مم رأس أسطواني داخلي | محرك سداسي داخلي | فولاذ سبائكي مؤكسد حراريًا أسود (50/عبوة)

These M12 bolts threaded in smoothly and the black oxide finish looks great on my shop press jig. The hex socket drive holds the Allen key securely without any wobble during tightening.

The black oxide finish is exactly what I needed for a jig build—screws thread in smooth and the socket drive seats perfectly with no stripping. I used a full pack on a fixture setup and every single one torqued down clean, so for the price per piece this is a solid buy for precision work.

Put these into a jig for production drilling and they seated perfectly, no wobble or binding. Threads are clean and the 45mm length was exactly what I needed for that assembly. Only wish the hex drive was a tad deeper for better wrench hold.