T thread bolt are used in transmission and connection! *Standard:DIN,ASIN *Grade:5.8,6.8,8.8,10.9 ASTM A325 *Packing:Carton T-THREAD HEX BOLTStandard:DIN,ASINMaterial:Carbon steel.Diameter:5mm-50mm,1/4"-2"Length:8mm-300mm,5/16"-12"Thread:T-THREADGrade:4.8,5.8,6.8,8.8,10.9 ASTM A325Finish:Plain,Zinc,Blank,Nickel,Chrome,H.D.GPacking:Carton,Small Box,Bag,Pallet