Standard:DIN,GB,ASME Class:4.8,5.8,6.8,8.8,10. ... demand We have our own factory and manufacture bolts,screws,nuts and washers.our company aim to provide you with the ... best quality and competive price. 1),competitive price&high quality 2),Excellent service after sales over 3),quick delivery The sample ... drawing and specifications.we will give you an accurate quotation. ASME B18.2.1 hex lag screw