Anderson Metals Corp 55221 Standard Pol Nut Propane

Product Description

The ANDERSON METALS CORP 55221 is a standard POL (Prest-O-Lite) nut used to connect propane cylinders and valves in LP gas systems. It features a 7/8-inch hex body, measures 1 inch in length, and has a 5/8-inch smooth inner diameter center hole. The left-hand thread configuration is standard for propane service — a deliberate design that prevents accidental cross-connection with right-hand-threaded fittings used in other gas services. Plumbers, LP gas technicians, and HVAC service pros use this fitting when servicing or assembling propane cylinder connections, regulators, and associated gas train components.

This POL nut is suited for residential and light commercial propane applications, including cylinder-to-regulator connections on standby heating systems, portable LP equipment, and propane supply lines. Its bulk packaging makes it a practical stock item for service vans and supply houses handling frequent LP gas fitting work.

Key Features

• Left-hand thread per propane industry standard — prevents cross-connection with oxygen or natural gas fittings
• 7/8-inch hex profile for standard wrench engagement
• 1-inch overall length for full thread engagement on POL valve connections
• 5/8-inch smooth inner diameter center hole accommodates standard POL valve stems
• Bulk pack of 5 units for shop or van stock

Compatibility

Designed for use with standard POL-style propane cylinder valves and regulators common in residential and light commercial LP gas systems.

Installation Notes

Installation should be performed by a licensed LP gas technician or qualified plumber familiar with NFPA 58 and local propane code requirements. Always close the cylinder valve and relieve line pressure before removing or installing POL fittings. Left-hand threads require counter-clockwise rotation to tighten — do not force or over-torque. Leak-test all connections with an approved gas leak detection solution after assembly.