Tapco 931-600 Polypropylene Locknut

Product Description

The TAPCO 931-600 is a polypropylene locknut designed for securing fittings and connectors in piping and venting applications. Made from polypropylene, this locknut offers chemical resistance and durability suited to the demands of plumbing and HVAC installations. At 0.34 pounds, it is a lightweight fastener component. Licensed plumbers, HVAC technicians, and pipefitters typically specify polypropylene locknuts where corrosion resistance or compatibility with non-metallic piping systems is required. This part ships as a single unit and is stocked for maintenance, repair, and new construction work.

The 931-600 locknut is appropriate for residential and light commercial piping, venting, or drainage applications where a polypropylene-rated mechanical connection is needed. It is commonly used when securing bulkhead fittings, conduit connectors, or similar threaded components to panels, tanks, or enclosures. Installers working with PVC, CPVC, or polypropylene piping systems frequently use this type of locknut as part of leak-free assembly.

Key Features

• Polypropylene construction provides corrosion resistance and compatibility with chemical-carrying systems
• Lightweight at 0.34 pounds, reducing load on fittings and assemblies
• Designed for secure threaded locking in piping, venting, and enclosure applications
• Suitable for use in non-metallic piping system assemblies

Compatibility

Designed as an OEM-style replacement or service locknut for polypropylene piping and fitting applications in residential and light commercial systems.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off water supply or isolate the relevant system section before disassembling any fittings. Hand-tighten the locknut first to ensure threads seat properly before applying tool pressure. Over-torquing polypropylene locknuts can crack the fitting body, so follow the fitting manufacturer's torque guidance.

Technical Specifications

• Material: Polypropylene
• Weight: 0.34 pounds
• UPC: 038877541364

Standard Information

• Brand: TAPCO
• Manufacturer Part Number: 931-600