Parker 66NTA-6-4 Compression Tube Connector 1/4 Inch Brass

Product Description

The PARKER 66NTA-6-4 is a brass compression tube connector designed to join tubing to female NPT threaded ports in fluid and pneumatic line systems. It features a compression inlet on one end and a 1/4-inch FNPT outlet on the other, allowing a secure, leak-resistant connection without soldering or flaring. Rated to 150 psi maximum working pressure and suitable for temperatures ranging from -40 degrees F to 200 degrees F, this fitting handles demanding service conditions in mobile equipment, brake, and fuel line applications. At 0.1 pounds, it is a compact, single-piece brass fitting built to DOT FMVSS571.106, SAE J1131, and SAE J246 standards.

This connector is used in hydraulic, pneumatic, and fluid transfer plumbing where a compression tube must transition to a female NPT threaded port. Typical applications include mobile vehicle brake lines, fuel systems, and air line assemblies that require DOT-compliant fittings. It is suited for residential and commercial service vehicles, industrial equipment, and anywhere a reliable compression-to-FNPT interface is required. Installation is performed by qualified plumbing, HVAC, or fleet maintenance technicians familiar with compression fitting assembly procedures.

Key Features

• Compression x FNPT end connections for tool-free, solder-free tube joining
• 1/4-inch thread size with NPTF thread standard for pressure-tight sealing
• 150 psi maximum working pressure rating
• Operating temperature range of -40 degrees F to 200 degrees F
• Brass construction for corrosion resistance and durability
• Certified to DOT FMVSS571.106, SAE J1131, and SAE J246 standards

Compatibility

Designed as an OEM-style compression tube connector for fluid and pneumatic line systems requiring a 1/4-inch FNPT port connection in DOT and SAE-compliant installations.

Installation Notes

Installation should be performed by a licensed plumber or qualified technician familiar with compression fitting assembly. Depressurize and drain the line completely before removing or installing any fittings. Hand-tighten the compression nut first, then use a wrench to snug the connection per standard compression fitting practice — do not overtighten. Verify system pressure does not exceed the 150 psi rating before returning the line to service.