ISO 4762 Hex Socket Head Cap Screw Grade 8.8 10.9 - China Screw of Head Hex Cap and Hex Head Cap Screw 1/2-13
A325 A307 Din933 Din931 standard 4.8 8.8 MS hex head cap screw black or zinc plated M6 M8 bolt, View M8 bolt, changlan Product Details from Handan Chang Lan Fastener Manufacturing Co.,