Hex chamfered single face
Hex with flange
Raised countersunk head
12-point
Hex with hole
Hex cap Low
Hex with shoulder
Hex chamfered double faces
Hex cap with collar
Hex spherical flange
Tubular end
Semitubular end
Conical spring washers
JB/T 6687-1993
12-Point flange nuts
JB/T 9592.1-1999
Prevailing torque type all-metal twelve point flange nuts