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