Slot
Hex socket
Square socket
Hex chamfered single face
Cheese
Square
Hex with collar
Hex with hole
Hex chamfered double faces
Full thread
Flat point
Semitubular end
Q 616-1999
Slotted plunger plugs
QC/T 377-1999
Slotted cylinder plug
JB/T 8037-1999
Screw Plug-typeA
Q 616-2012