... 4>Thickness: 1.5-3.0mm 5>Size:41*41mm,41*25mm NIut and bolt:Specifications:Material:35# 45# steel.40Cr.35Crmo. Finish:Black ... bolt(DIN931,DIN933, DIN601, DIN558, GA/T5780-GB/T5783, JISB1180, ANSI/ASME B18.2.1,B.S.W916) ,high strength bolts stud bolt ... , U bolt , T bolt, carriage bolt(DIN603), threaded rod(DIN975), anchor bolt(DIN529,IFI136, GB/T799), square head ...