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.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.