Stainless steel magnetic plugs GN 738.5 attract iron particles which might be floating in the fluid. The stainless steel makes them suitable for use in particularly aggressive environments.
To avoid breakage or demagnetization, the round magnets are fitted with a plastic distance and protection tube. This tube has to be removed prior to installing the plug.
The seal is embedded in a radial recess, and thus cannot be lost or squeezed out during tightening.
The outer diameter d1 of stainless steel threaded plugs is matched to screw-in holes for pipe fittings according to DIN 3852.