Material 42CrMoA, 35CrMoA, 40Cr, 45#
Product level 8.8, 10.9, 12.9
Product specifications M24, M27, M30, M33, M36, M39, M42, M48, M56, M64, M72
Executive Standards GB/T5782、GB/T5783、EN14399 Or according to customer requirements