Parker VS68AB-8-6 Compression Tube Connector 3/8-18

Product Description

The PARKER VS68AB-8-6 is a brass compression tube connector designed to join tubing to a male NPT port in fluid and pneumatic line assemblies. It features a 3/8-18 NPTF thread and a compression-by-MNPT end connection configuration. With a maximum working pressure of 400 psi and a rated temperature range of -65 to 250 degrees F, this fitting is built for demanding service conditions. It meets D.O.T. FMVSS571.106 and SAE J246 standards, making it appropriate for regulated mobile and hydraulic brake line applications. Licensed plumbers, HVAC technicians, and fleet maintenance technicians install this fitting in both stationary and mobile equipment contexts.

This connector is used in hydraulic, pneumatic, and fluid transfer lines where a compression tube end must transition to a threaded male NPT port. Typical applications include brake line assemblies, fuel system plumbing, and air line installations on commercial vehicles and industrial equipment. The 0.408-inch inside diameter accommodates standard tubing sizes for these system types. It is equally suited to shop-fabricated assemblies and field repair work where a reliable, pressure-rated compression fitting is required.

Key Features

• Compression x MNPT end connections for tube-to-pipe-thread transitions
• 3/8-18 NPTF thread for leak-resistant dryseal engagement
• 400 psi maximum working pressure for hydraulic and pneumatic service
• Operating temperature range of -65 to 250 degrees F
• Brass construction for corrosion resistance and machinability
• Meets D.O.T. FMVSS571.106 and SAE J246 standards for regulated applications

Compatibility

Designed as an OEM-style replacement or service fitting for compression tube connector applications requiring a 3/8-18 NPTF male thread and a compression tube inlet in brass fluid line assemblies.

Installation Notes

Installation should be performed by a qualified technician familiar with compressed fluid or pneumatic line work. Shut off and fully depressurize the system before removing or installing any fittings. Hand-tighten the NPTF thread first, then apply wrench turns per standard dryseal thread practice — do not overtighten, as brass threads can be damaged. Verify all connections are leak-free before returning the system to service.