Q 619-1999
Inner hexagon conical screw plugs
DIN 906-1992
Hexagon socket pipe plugs
QC/T 378-2013
Inner hexagon conical screw plug
JB/ZQ 4447-2006
Hexagon socket screws plug with 60°sealed pipe thread
QC/T 884-2011
Hexagon socket pipe magnetic plugs
QC/T 378-1999
Inner hexagon conical screw plug
Q 621-1999
Square groove tapered magnetic plugs
QC/T 384-1999
Square groove tapered magnetic plug
Q 619-2012
Inner hexagon conical screw plugs
Q 624-2012
Hexagon socket pipe magnetic plugs
CNS 4848-1982
Hexagon socket pipe plugs with taper thread
JB/ZQ 4447G-2006
Hexagon socket screws plug with 60° sealed pipe thread