DIN 909-1992
Inch hexagon head pipe plugs(d≤18mm)
DIN 909-1992
Inch hexagon head pipe plugs(d≥20mm)
JB/ZQ 4446-2006
Hexagon soket plug with 55° sealed pipe thread
CNS 4844-1982
Heavy type hexagon head pipe plugs with shoulder, vent hole and parallel thread
CNS 4846-1982
Inch hexagon head pipe plugs with taper thread(d≤18mm)
CNS 4846-1982
Inch hexagon head pipe plugs with taper thread(d≥20mm)