CNS 4845-1982
Light type hexagon head pipe plugs with shoulder and parallel thread(d≥18mm)
CNS 4845-1982
Light type hexagon head pipe plugs with shoulder and parallel thread(d≥18mm)
CNS 4846-1982
Hexagon head pipe plugs with taper thread(d≤18mm)
CNS 4846-1982
Hexagon head pipe plugs with taper thread(d≥20mm)
CNS 4847-1982
Hexagon socket pipe plugs with shoulder and parallel thread
CNS 4848-1982
Metric hexagon socket pipe plugs with taper thread
JB/ZQ4444-1997
Hexagon socket pipe plugs with shoulder and parallel thread
JB/ZQ4444-2006
Hexagon socket pipe plugs with shoulder and parallel thread
CB/T 23-1999
Hexagon head plugs