Hex chamfered single face
Hex with hole
Hex with shoulder
Hex chamfered double faces
Hex unchamfered
HG/T 20634-2009
Hexagon nuts for steel pipe with flange
HG/T 20613-2009
Bolting for use with stral pipe falanges-Hexagon nuts,style 1
HG/T 20613-2009
Bolting for use with stral pipe falanges-Hexagon nuts,style 1,with fine pitch thread
HG/T 20634-2009
Hexagon nuts-Style 1