Brass Oil level sight glass Plug NPT1/2" checks coolant level sight glass

Material Body:   Brass

O-Ring: Viton,FKM,FPM,NBR, Aramid gasket and Copper seal

Glass Thickness: 2mm to 8 mm

Reflectors: Stainless Steel 304 Reflector

                 (Any type you can chose with reflector or without Reflector,  You also can add float ball.)

Glass Type: Natural Glass,Tempered Glass and Borosilicate Glass 

Resist Tempreature Range:-30'C to 180'C

Pressure Range:  5-50 Bar(1MPa to 5 MPa).

Thread type:NPT,NPTF,UNC,UNF,Metric and BSP(G thread)

Size： Below you will get the size you wanted.Another size is okay.OEM are welcome.

Usage:  Pump,Oil Receivers,Gearboxes,Speed Reducer,Worm gearbox, helical gear boxes, variable speed motor, rotomotive Worm gearboxes,Compressor and Power Transimission.