... standard size stud bolt Description Standard:ANSI,ASTM,JIS,DINGrade:Class 4.8 / 5.8 / 6.8 / 8.8 / 10.9 / 12.9 & Grade 2, 5 ... ,8Diameter:M6-M48 1/4''-2''Length:6mm-300mm 3/8''-12''Material ... AS, BS, JIS, GB, ISO and other standard&non-standard specifications base on our customers’ special request and drawings ... ."Whenever you need fasteners, contact us ” standard size stud bolt