Parker A5TMC2 Tube Stem Adapter 5/16 in Od 1/8 in Nptf

Product Description

The PARKER A5TMC2 is a push-to-connect tube stem adapter designed to create a quick, tool-free connection between pneumatic or fluid tubing and a threaded port. Built from polyoxymethylene (POM), a rigid acetal-based thermoplastic, this fitting delivers reliable performance in low-to-medium pressure applications up to 300 psi. The tan-colored body resists moisture and common chemicals, making it well-suited for compressed air, instrumentation, and light fluid transfer lines. HVAC technicians, plumbers, and instrumentation contractors install this fitting where a fast tube connection to a threaded male port is needed without soldering, flaring, or compression tooling.

This adapter is used in residential and light commercial applications where 5/16 inch OD tubing must terminate at a 1/8 inch NPTF threaded port. Typical install scenarios include refrigeration instrumentation lines, pneumatic control tubing, and low-pressure fluid transfer systems. The NPTF thread form provides a pressure-tight mechanical seal without requiring additional sealant on the threads, though practices vary by application and local code.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion and release
• Rated to 300 psi for compatibility with compressed air and low-pressure fluid systems
• Polyoxymethylene (POM) body resists moisture, oils, and many common chemicals
• 1/8 inch NPTF thread creates a pressure-tight seal at the port connection
• Accepts 5/16 inch OD tubing without compression rings or ferrules
• Compact, lightweight form factor at 0.05 pounds per piece

Compatibility

Designed as an OEM-style push-to-connect fitting for pneumatic, instrumentation, and light fluid transfer systems using 5/16 inch OD tubing and 1/8 inch NPTF threaded ports.

Installation Notes

Installation is performed by qualified HVAC technicians, plumbers, or instrumentation mechanics following applicable codes. Depressurize and isolate the system completely before removing or installing any fittings. Insert tubing fully into the push-to-connect body until it seats to ensure a leak-free connection; a partial insertion is the most common cause of leaks. Verify NPTF thread engagement is adequate and inspect for leaks at full system operating pressure before returning the system to service.