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Sight Plugs

Available52 products
Sight plugs allow visual observation of liquid levels inside a tank or container. Also known as sight checks, they permit a quick inspection to show the presence of oil in gear cases and bearing housings, or indicate liquid levels in reservoirs.

Aluminum Oil Level Sight Plugs for Medium-Pressure Applications

Aluminum Oil Level Sight Plugs for Medium-Pressure Applications
These oil-level sight plugs have aluminum housings and clear viewing lenses. Aluminum plugs can handle higher pressures and temperatures than brass plugs, but less pressure than steel plugs.
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Threaded Plastic Through-Wall Oil Level Sight Plugs

Threaded Plastic Through-Wall Oil Level Sight Plugs
These oil-level sight plugs have plastic housings that secure in threaded openings to provide liquid-level monitoring for applications with no internal pressure. Transparent thermoplastic housings resist temperature and solvents.
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Domed Oil Level Sight Plugs

Domed Oil Level Sight Plugs
These oil-level sight plugs have plastic housings with domed lenses that enable viewing of the liquid level from various angles. Transparent thermoplastic housings resist temperature, water, and solvents.
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Press-Fit Through-Wall Oil Level Sight Plugs

Press-Fit Through-Wall Oil Level Sight Plugs
These oil-level sight plugs have plastic housings that press into unthreaded round bores to provide liquid-level monitoring for applications with no internal pressure. Transparent thermoplastic housings resist temperature and solvents.
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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order.