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
JB/T 8037-1999
Screw Plug-typeA
JB/ZQ4444-1997
Hexagon socket pipe plugs with shoulder and parallel thread
JB/ZQ4444-2006