Nut Series:
  GB code
  Standard Title
  Specifications of the thread
  GB/T6170-2000
  I type hexagonal nut
  M1.6-M64
  GB/T6171-2000
  I type hexagonal nut - fine tooth
  M8 * 1-M64 * 4
  GB/T6172.1-2000
  Thin hexagonal nut
  M4-M12
  GB/T6173-2000
  Thin hexagonal nut - fine tooth
  M8 * 1-M64 * 4
  GB/T6177-1986
  47.60 flange nut
  M3-M20
  GB/T62-1988
  Butterfly nut
  M3-M12
  GB/T808-1988
  Bian special small hexagonal nut fine tooth
  M4-M24 * 0.5 * 1
  GB/T810-88
  Small round nut
  M10 * 3 * 1-M200
  GB/T812-1988
  Round Nut
  M10 * 3 * 1-M200
  GB/T889.1-2000
  I-type non-metallic inserts 47.60 locking nut
  M3-M36
  GB/T889.2-2000
  I-type non-metallic inserts 47.60 locking nut - fine tooth
  M8 * 3 * 1-M36
  GB/T923-1988
  --Nut
  M3-M24
  GB/T13680-1992
  Welding, nut
  M4-M16
  GB/T13681-1992
  Welding hexagonal nut
  M4-M16