Q 801-1999
Nuts for sleeve pipe joint
GB/T 3759-1983
Nuts for sleeve pipe joint
Q 802-1999
Hexagon thin nuts for sleeve pipe joint
GB/T 3763-1983
Hexagon thin nuts for sleeve pipe joint
Q 818-1999
Caramel hex bolt (two holes)
GB/T 3750.3-1983
Caramel hex bolt (two holes)
Q 818-1999
Carset hex bolt
GB/T 3750.3-1983
Carset hex bolt
Q 801B-2012
Nuts for sleeve pipe joint
Q 802B-2012
Hexagon thin nuts for sleeve pipe joint