براغي رأس مقبس M42-4.5 × 150 مم | محرك مقبس سداسي | جزئية الخيوط | فولاذ سبائك كلاس 12.9 مؤكسد حراري أسود

Had to swap out some worn bolts on a press jig, and these M42s threaded in smooth and true with no binding. The black oxide finish feels robust, and the partial threading gave me just the right grip depth for the assembly.

Picked up a pack of these for a custom tooling project, and the thermal black oxide finish feels like it’ll hold up well against wear. The hex socket drive made installation straightforward with my Allen key, and they threaded smoothly into the jig frame.

The black oxide finish on these M42 screws is really clean and seems tough enough for heavy jig use I've put them through. The hex socket drive grabbed perfectly with my Allen key, no slipping at all.