... 40Cr 2.size:1/2''-1.1/8'' & M12 -- M36 3.mechanical grade:8.8/10.9/12. ... HRC38-HRC42 raw material40Cr,35CrMosize1/2''--1.1/4,M12--M36Colorblackgrade10.9/12.9handnessHRC35-42(BOLT),HRC29-36( ... company has become a leading and famous company in China. We sell fasteners, hardware and automotive spare parts ... EquipmentStrong PackageMode of TransportationThe Best Choice for You M12-M36 and 1/2''-1.1/4'' roller ...