Parker 68C-5-2 Compression Tube Connector 5/16 Od Brass

Product Description

The PARKER 68C-5-2 is a brass compression tube connector designed to create a leak-tight joint between a 5/16-inch OD tube and a 1/8-27 NPTF male pipe thread fitting. Rated for a maximum working pressure of 300 psi and a temperature range of -65 to 250 degrees F, this connector handles the pressure and thermal demands common in instrumentation, fuel, refrigeration, and hydraulic lines. The compression end eliminates the need for flaring or soldering, allowing a faster, repeatable connection. Plumbers, HVAC technicians, and instrumentation mechanics install this fitting where a tube-to-pipe transition is required in tight or service-accessible locations.

This connector suits residential and light commercial applications wherever a 5/16-inch OD tube must terminate at a 1/8-27 male pipe thread port. Typical install scenarios include fuel and oil lines, air and pneumatic circuits, and refrigerant or process fluid tubing runs that require a reliable metal-to-metal compression seal. The NPTF thread form provides a pressure-tight mechanical seal independent of sealant, though thread sealant is commonly applied per system requirements. Brass construction makes it compatible with a wide range of non-corrosive fluids and gases.

Key Features

• Compression x MNPT end connections for tube-to-pipe transitions without flaring or soldering
• 300 psi maximum working pressure for demanding fluid and gas systems
• Operating temperature range of -65 to 250 degrees F
• Brass construction provides corrosion resistance in non-corrosive media
• Meets SAE J-512 standard for compression tube fittings
• NPTF thread form delivers a pressure-tight mechanical seal

Compatibility

Designed as an OEM-style compression fitting for systems using 5/16-inch OD tubing with a 1/8-27 NPTF male pipe thread port, conforming to SAE J-512.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified instrumentation mechanic familiar with compression fittings and applicable codes. Shut off and depressurize the system fully before disassembly or installation. Hand-tighten the compression nut onto the fitting body, then advance with a wrench per standard compression fitting practice — do not overtighten, as brass fittings are susceptible to thread damage. Apply thread sealant to the MNPT threads as required by the system fluid, local codes, or manufacturer guidelines.