Now we update some test items for the bolts ,screws and studs.with the test standard.Kinsom test will follow all this when we control in house or in the third party ,SGS,CTI or required by clients,Kinsom can take control those following items in house:

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.