Type OS - neutral coding
Type ES - with DIN refill symbol
Type AS - with DIN drain symbol
Identification 1 - without vent drilling
Identification 2 - with vent drilling
GN742 Threaded Plug, With Optional DIN Drain / Fill Symbol, Aluminium, Blank
Threaded plugs GN 742 are fitted with outside diameter d1 to suit screw holes with BSP threads to DIN3852.
The seal is bedded into a undercut groove which prevents it from dropping out and at the same time stops it from being extruded when tightening the cap. The seal can therefore be kept fairly soft which improves sealing on uneven surfaces.
Aluminium AL, fine turned.
Type OS, ES, AS - blank.
Symbols - laser engraved
Temperature resistant up to 180 °C
Sealing ring rubber FPM (Viton®), identification by not black finish of seal.