... T 1228-1231,ISO7412,DIN6914-6916,ASME B 18.2.6 (ASTMA325,A490), JISB1186 AS1252Grade:8.8S, 10.9S , ... ASME B18.2.3.5 ASME B18.2.3.6 ASME B18.2.3.7Product name: Track bolt and ... bolt and nut5-Surface dealing : Black, Grey(phosphated, Parkerising)6- Thread standard : Thread length tolerance according to GB/T ... commercial ship building industry Special high strength bolt with flange washer with CE certifation