... 9,12.9 4.Surface:customers demand 1. Standards: DIN ,ANSI/ASME, BS, GB, JIS, Non-standard2. Material: Carbon ... High strength alloy steel double end stud- , fully-threaded stud and heavy hex nut applied on petrochemical industry, boiler ... the length is from 60MM-1400MM. 2. Metric and ANSI round head oval neck bolt (fish bolt) with ... of Grade 4.8, 8.8, 10.9 and ANSI Grade 2, 5 and 8. 7. Various nuts, ...