Conbraco C157606 Glass Nut

The Conbraco C157606 Glass Nut is a critical component for maintaining the integrity of industrial water gauge sets and liquid level gauges. This 1-1/4" brass glass nut is precision-machined from high-grade brass to ensure a reliable, pressure-tight seal on standard tubular gauge glass. Designed for compatibility with various Apollo/Conbraco water gauges, it provides the necessary torque distribution to prevent leaks while avoiding the risk of glass breakage during installation. In commercial boiler and piping applications, the C157606 serves as a direct OEM replacement part, ensuring your system maintains its ANSI/ASME compliance and operational safety. Its heavy-duty construction resists corrosion and thermal expansion, making it a staple for contractors performing routine maintenance on steam systems and process equipment. Use this nut to secure the stuffing box and packings in sight glass assemblies where a dependable mechanical connection is non-negotiable.

• Precision Fit: 1-1/4" NPT threads specifically machined for Conbraco gauge valves to ensure structural integrity under pressure.
• Durable Brass Construction: High-quality brass alloy resists dezincification and provides long-term durability in HVACR environments.
• Easy Installation: Knurled or hex-shaped surface (depending on specific valve series) allows for accurate hand-tightening or low-torque wrenching to secure tubular gauge glass.
• Industrial Versatility: Suitable for a wide range of fluid applications, including water, oil, and low-pressure steam level monitoring.

Common Installation and Maintenance Questions

What is the thread size of the Conbraco C157606?
The C157606 glass nut features a 1-1/4" internal thread diameter designed to match standard Conbraco water gauge series valve bodies.

Is this nut compatible with all sight glass brands?
While it follows standard sizing, it is specifically engineered for Apollo Valves and Conbraco assemblies. Always verify the pitch and diameter of your current stuffing box before replacement.

Should I use pipe dope or tape on these threads?
In most HVACR gauge applications, the seal is created by the compression of the packing around the glass, not the nut threads. Using tape can sometimes interfere with proper seating and torque sensing.

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.