Parker PT-00256 Brass Flare Male Adapter 5/16 in 1/8-27 Nptf

Product Description

The PARKER PT-00256 is a brass flared tube male adapter designed to connect a 5/16-inch OD flared tube to a 1/8-27 NPTF male thread. The fitting features a 37-degree flare angle on the tube end and a National Pipe Taper Fuel (NPTF) thread on the male end, creating a pressure-tight mechanical seal without additional sealant. Rated to 3,300 psi maximum working pressure, this adapter is suited for hydraulic, fuel, and refrigeration lines where reliable, leak-free connections are required. Plumbers, HVAC technicians, and hydraulic system installers use this type of fitting in both stationary and light industrial applications.

This adapter is appropriate for use in residential and light commercial systems that require a transition from a flared copper or steel tube to an NPTF-threaded port. Typical installations include fuel delivery lines, refrigerant circuits, hydraulic manifolds, and compressed air systems where the tube OD is 5/16 inch and the receiving port is a 1/8-27 NPTF thread. The brass construction provides corrosion resistance in wet or chemically active environments. Sold in a package quantity of 5.

Key Features

• 37-degree flare angle conforms to standard SAE flare fitting geometry for a reliable metal-to-metal seal
• 1/8-27 NPTF thread provides a dry-seal mechanical connection at the male end
• 3,300 psi maximum working pressure rating for demanding hydraulic and fuel system use
• Brass construction resists corrosion in fuel, refrigerant, and water service environments
• Accepts 5/16-inch OD tubing on the flare end
• Packaged in quantities of 5 for bench stock and service inventory

Compatibility

Designed as a standard SAE 37-degree flare-to-NPTF male adapter for systems using 5/16-inch OD tubing with a 1/8-27 NPTF threaded port. Verify thread standard and flare angle at the mating port before installation.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or hydraulic systems technician familiar with flared tube fittings and NPTF thread connections. Depressurize and drain the system completely before removing or installing any fitting. Inspect the flare seat and NPTF port for damage or debris before assembly. Do not over-tighten; NPTF threads are designed to seal by thread interference, and excessive torque can distort the fitting or damage the mating port.