460pcs 12.9 grade black carbon steel knurled socket head cap screw set, DIN912 M3 M4 M5 M6 nuts and washers, for machinery.

460pcs 12.9 grade black carbon steel knurled socket head cap screw set, DIN912 M3 M4 M5 M6 nuts and washers, for machinery.

Aliexpress UK