This ARP M12 x 1.25 12-point 2-piece nut kit (noted with a 5/8 wrench reference) supplies two M12 x 1.25 12pt nuts intended for specific service or assembly uses. The compact kit lists the wrench size for correct tool pairing and provides the metric thread engagement needed in engine or mechanical hardware where that two-piece arrangement is required.
ARP M12 X 1.25 (5/8 wr) 12pt 2pc nut kit