Standard: GB/T5782-5786 ISO4014,4017,8676,8765 DIN931,933,960,961 ASMEB18.2.1 JISB1180 AS1110 Grade: 8. 8, 10. 9, 12. 9, 5, 8 Size: M6-M100, 1/4"-4" Material: Carbon Steel, Alloy Steel