Hex chamfered single face
Flat round head
Hex with shoulder
Cheese with hole
Hex chamfered double faces
Cheese with shoulder
Hole on shank
Normal shank
Tubular end
Semitubular end
GB/T 3759-1983
Nuts for sleeve pipe joint
GB/T 3763-1983
Hexagon thin nuts for sleeve pipe joint
GB/T 3750.3-1983
Caramel hex bolt (two holes)
Carset hex bolt