Parker 62PTC-6-4 Push-to-connect Union 3/8 X 1/4 Brass

Product Description

The PARKER 62PTC-6-4 is a push-to-connect tube-to-tube union fitting designed for fast, tool-free connections in pneumatic and air brake systems. Constructed from brass with a nitrile O-ring seal, it joins two tube ends with different outside diameters — 3/8 inch and 1/4 inch — without the need for flaring, threading, or compression sleeves. Rated to 250 psi maximum working pressure, it handles the demands of commercial vehicle air brake circuits and industrial pneumatic lines. At 1.57 inches overall length and 0.12 pounds, it is a compact, field-ready component that HVAC, fleet maintenance, and pneumatic system technicians install routinely.

This fitting is specifically classified as a DOT air brake fitting, meeting D.O.T. FMVSS571.106, SAE J2494, and SAE J2494-3 standards. It is suited for use in commercial vehicle air brake plumbing, compressed air distribution, and pneumatic control circuits where a reducing union between 3/8 inch and 1/4 inch OD tubing is required. The wide service temperature range of -40 degrees F to 200 degrees F makes it appropriate for both underhood vehicle environments and industrial installations subject to temperature extremes.

Key Features

• Push-to-connect design allows tool-free tube insertion for fast installation or field repair
• Reduces between 3/8 inch and 1/4 inch OD tube in a single inline union body
• Brass construction provides corrosion resistance in air and moisture-laden pneumatic systems
• Nitrile O-ring seals maintain integrity across a wide temperature range
• DOT-compliant — meets FMVSS571.106, SAE J2494, and SAE J2494-3 for air brake service
• Rated to 250 psi working pressure for demanding pneumatic circuit applications

Compatibility

Designed as a DOT-rated push-to-connect reducing union for pneumatic and air brake systems using 3/8 inch and 1/4 inch OD tubing, in applications requiring compliance with SAE J2494 and SAE J2494-3 standards.

Installation Notes

Depressurize and isolate the air line completely before removing or installing any push-to-connect fitting. Ensure tubing ends are cut square and deburred to achieve a proper seal. Technicians should verify tubing outside diameter matches the fitting port before insertion, as push-to-connect collets are size-specific. Reference applicable DOT and SAE regulations when servicing air brake circuits on commercial vehicles.