J.w. Winco TLT-G1 Oil Level Sight Glass G 1 Thread

Product Description

The J.W. WINCO TLT-G1 is a plastic oil level sight glass designed for monitoring fluid levels in industrial machinery, gearboxes, and hydraulic reservoirs. It features a G 1 thread connection with a 36mm distance across flats and a 42mm flange diameter, making it a compact and practical indicator for enclosed lubrication systems. The plastic window construction keeps weight low and resists common industrial oils. With a maximum operating temperature of 194 degrees F, this sight glass suits a broad range of standard-duty fluid monitoring applications. Installation requires basic hand tools and is performed by maintenance technicians and machine builders working on lubricated drive equipment.

This sight glass is suited for use in industrial and OEM applications where a visual fluid level check point is needed on gearboxes, oil reservoirs, bearing housings, and similar lubricated equipment. The G 1 BSP thread profile is standard in European and international machinery, making the TLT-G1 a direct replacement or new-installation fitting for equipment built to metric and BSP thread standards. The 13mm length under the head accommodates typical boss depths found on cast iron and steel housings.

Key Features

• G 1 BSP thread for compatibility with metric and international equipment standards
• 36mm distance across flats for standard wrench installation
• 42mm flange diameter provides a sealing surface against machined or cast bosses
• Plastic window material resists common lubricating oils and keeps assembly weight low
• Rated to 194 degrees F maximum operating temperature for standard-duty lubrication systems
• RoHS compliant construction

Compatibility

Designed as an OEM-style replacement or new-installation fitting for gearboxes, hydraulic reservoirs, and bearing housings equipped with a G 1 BSP threaded port.

Installation Notes

Installation is performed by maintenance technicians or machine builders. Always depressurize the system and drain or isolate the fluid reservoir before removing or installing any sight glass fitting. Use an appropriately sized open-end or box wrench on the 36mm flats and apply thread sealant compatible with the system fluid. Do not overtighten, as excessive torque can crack the plastic window body.