Body: Aluminum, turned, matte shot-blast finish
Symbols laser engraved
Seal: NBR synthetic rubber
GN 738 magnetic plugs attract iron particles which might
be suspended in the liquid.
The magnetic pin is of a length which makes it impossible
to demagnetize itself.
To avoid breakage or de-magnetizing, round rod magnets are
fitted with a plastic protection tube. This tube has to be
removed prior to installing the plug.
The seal is retained in a radial undercut in the mating face,
which prevents it from dropping out and from extruding when
the plug is tightened. For this reason the seal can be of
a softer material which offers better sealing.
NBR seal: maximum heat resistance: 120°C (250°F).