GB/T 802.3-2009

Acorn hexagon nuts with flange—Welding type

GB/T 802.4-2009

Hexagon cap nuts — Welding type

GB/T 802.5-2009

Prevailing torque type hexagon acorn nuts with non-metallic insert - Welding type

GB/T 923-2009

Acorn hexagon nuts

GB/T 802.1-2008

Acorn nuts,assembling type

GB/T 802-1988

Acorn nuts

GB/T 923-1988

Acorn hexagon nuts