Gaskets threaded oil sight glass, oil sight glass, oil sight gauge, Circular oil sight glass, oil sight gage, site glass, oil level indicator, liquid sight glass, oil sight window, view ports, male thread sight glass, visual level sight gauge, visual level sight glass, visual level indicator, domed shaped oil sight glass, oil sight glass plugs, round observation ports, NPT sight glass windows, reservoir oil sight glass, hydraulic tank oil sight glass, oil circulation sights,

Body material: aluminum, brass, PC, PPMA and steel

Glass:  Real glass 2 mm to 5 mm thickness.

O Ring:  Viton O rings

Size:  M10 to M42, 1/2 inch to 2 inch

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

Operate Temperature: -20 Celsius degree to 120 Celsius degree

Operate Pressure: 5-10 Bar or 0.5MPa to 1 MPa.

MOQ: 2000 Pcs each size

Delivery time: 20 days.

Payment:  T/T

Usage:  Pump, Thin-wall container, Radiator,Hydraulicreservoir, receivers,Gearboxes, Speed Reducer, Compressor and Power Transmission.

Different company have different requirements, OEM Service is welcome.