Conbraco C-1408-06 Glass Nut

Maintain the integrity of your hydronic or steam boiler level indicators with the Conbraco C-1408-06 Glass Nut. This genuine OEM replacement part is specifically engineered for 5/8" gauge glass assemblies, providing a precision fit for Apollo water gauges and liquid level indicators. Constructed from high-grade brass gauge glass nut stock, it offers superior resistance to the corrosive environments typically found in high-pressure steam and HVACR systems. With a standard 15/16-18 TPI thread, this nut facilitates a secure, leak-free seal when paired with fresh gauge glass packing. As a veteran-grade component, it is designed to withstand thermal cycling and mechanical stress without stripping or seizing. Whether you are performing routine maintenance on a boiler level indicator or replacing a corroded Apollo water gauge glass nut during an emergency call, using this Conbraco C-1408-06 ensures your system remains compliant with original equipment specifications and operational safety standards.

• Precision Threading: Features a factory-spec 15/16-18 thread to ensure a perfect match with 5/8" OD sight glass fittings.
• Durable Brass Construction: Heavy-duty forged brass helps prevent galling and resists common boiler water treatment chemicals.
• OEM Compatibility: Designed specifically for use with Conbraco and Apollo series water gauges, ensuring no-guesswork installation for service technicians.
• Enhanced Sealing: Provides the necessary compression for tubular glass gaskets to prevent hazardous steam leaks and false water level readings.

What is the correct thread size for the Conbraco C-1408-06?
This nut uses a 15/16-18 TPI (Threads Per Inch) specification, which is the standard sizing for most 5/8" gauge glass applications in the Apollo/Conbraco catalog.

Should I reuse old packing when installing this new glass nut?
No. For a reliable seal and to prevent glass breakage, always use new friction washers and packing glands when installing a replacement nut.

Is this nut compatible with other brands of water gauges?
While designed for Conbraco/Apollo, it is compatible with any liquid level gauge that utilizes 5/8" diameter glass and matching 15/16-18 threads.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.