Verschlussschraube
drain plug
hex head pipe plug
hex socket pipe plug
hexagon head pipe plug
hexagon head screw plug
hexagon socket pipe plug
hexagon socket screw plug
lock screw
locking screw
pipe plug
plug screw
screw cap
screw plug
screw-in stopper
sealing plug
sealing screw
threaded joint
Dostopnost
Dostopnost