GB/T 923-2009
Acorn hexagon nuts
GB/T 810-1988
Small round nuts(d≤M100)
GB/T 810-1988
Small round nuts(d≥M105)
GB/T 6174-2016
Hexagon thin nuts - Unchamfered
GB/T 6172.2-2000
Prevailing torque type hexagon thin nuts(with non-metallic insert)
GB/T 56-1988
Hexagon thick nuts
GB/T 6173-2015
Hexagon thin nuts , Fine pitch thread
GB/T 6177.1-2016
Hexagon nuts with flange，style 2
GB/T 6177.2-2016
Hexagon nuts with flange，style2-Fine pitch thread
GB/T 805-1988
Tight nuts
GB/T 41-2016
Hexagon nuts
GB/T 6187.1-2016
Prevailing torque type all-metal hexagon nuts with flange,style 2
GB/T 97.3-2000
Plain washers for clevis pins
GB/T 6187.2-2016
Prevailing torque type all-metal hexagon nuts with flange, style 2，Fine pitch thread
GB/T 5287-1985
Extra large washers
GB/T 802.1-2008
Acorn nuts,assembling type
GB/T 7244-1987
Heavy duty spring washers
GB/T 96.1-2002
Plain washers-Large series
GB/T 861.1-1987
Internal teeth lock washers
GB/T 861.2-1987
Serrated lock washers internal teeth
