... 12.9 4.Surface:customers demand 1. Standards: DIN ,ANSI/ASME, BS, GB, JIS, Non-standard2. Material: ... Asia, etc. Professional production and processing: nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, ... length is from 60MM-1400MM. 2. Metric and ANSI round head oval neck bolt (fish bolt) ... , 10.9 and ANSI Grade 2, 5 and 8. 7. Various nuts, flat gaskets, spring washers, mechanical bolts, ...