Standard:

GB/T5780-5786,
ISO4014, 4017, 8676, 8765,
DIN931, 933, 960, 961,
ASMEB18. 2. 1,
JISB1180,
AS1110

Grade:

4. 8, 8. 8, 10. 9, 12. 9

  Size:

M6-M100

  Material:

Carbon Steel