National standard nut size
1. The standard size of stainless steel nut is m1.6-m64.
Stainless steel national standard nuts include: hexagon nut (GB6170/DIN934), thin nut (GB6172/DIN439), heavy duty nut (metric, us), nylon lock nut (din 985-din 982 thick), all-metal lock nut (DIN980M), cover nut (DIN1587).
Flange nut (GB6177/DIN6923), flange nut nylon lock nut (DIN6926), welding nut (DIN928), hexagonal welding nut (DIN929), butterfly cap (GB62, DIN315, us), K cap, etc.
2. The standard size of alloy steel national standard nut is 5/16-4".
Alloy steel national standard nuts include hexagon nut (GB6170/DIN934, GB6175), flange nut (GB6177/DIN6923) round nut (GB812), small round nut (GB810), us square nut, us hexagon nut (ANSI/ASME B18.2.2), heavy nut (metric, us).