Kinsom fasteners standard share on GB∕T 3098.13-1996 Mechanical properties of fasteners-Torsional test and Minimum torques for Bolts Screws with nominal diameters 1MM to 10MM from Grade8.8-12.9,more details about the how to test the torques in process of fasteners before shipping out.Kinsom follow the inspection rules and system ISO 9001:2015 certificate.Our weld bolt meet your specific demands.

Annually certificated the inspection tools is necessary when you need make sure the quality of fasteners.Machines and tools would be demage if you have been using for longtime.Kinsom will take step by step following with quality control system and produce the fasteners meet the customer's request.