Type OS - neutral coding
Type ES - with DIN refill symbol
Type AS - with DIN drain symbol
Type OSS - neutral coding, black anodized
Type ESS - with DIN refill symbol, black anodized
Type ASS - with DIN drain symbol, black anodized
Identification No.1 - without vent drilling
Identification No.2 - with vent drilling
GN741 Threaded Plug, Aluminium
Threaded plugs GN741 are fitted with outside diameter d1 to suit screw holes with BSP threads to DIN 3852.
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 will improve sealing on uneven surfaces.
Aluminium, fine turned.
Type OS, ES, AS - blank. Type OSS, ESS, ASS - black anodised.
Symbols laser engraved
Temperature resistant up to 100 °C
Sealing ring - rubber, NBR (Perbunan)