QC/T 379-2013
Square head bolts
Q 611-1999
Slotted cone plugs
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 382-1999
Slotted cone plug
Q 614B-1999
Square head bolts
QC/T 379-1999
Square head bolts
QC/T 378-1999
Inner hexagon conical screw plug
Q 614B-2012
Square head bolts
Q 619-2012
Inner hexagon conical screw plugs
CNS 4848-1982
Hexagon socket pipe plugs with taper thread
JB/ZQ 4447G-2006
Hexagon socket screws plug with 60° sealed pipe thread
