Brasscraft 68-6-6X Compression Mnpt Adapter 3/8 Inch

Product Description

The BRASSCRAFT 68-6-6X is a 68 Series brass adapter designed to connect 3/8-inch compression fittings to male NPT (MNPT) threaded pipe or tubing. This fitting provides a reliable mechanical transition between compression-style tubing connections and threaded pipe systems. It is constructed from brass, offering corrosion resistance and durability in potable water, gas, and other compatible fluid systems. Licensed plumbers and pipefitters install this adapter during new construction, remodel, and retrofit work wherever a compression-to-male-thread connection is required.

This adapter is suited for residential and light commercial plumbing applications, including supply line connections to faucets, angle stops, and fixture shut-offs. The 3/8-inch compression inlet accepts standard copper or compatible tubing, while the MNPT outlet threads directly into female-threaded fittings, valves, or fixtures. It is commonly used in under-sink plumbing configurations and appliance supply hookups where a secure, leak-resistant mechanical connection is needed without soldering.

Key Features

• 3/8-inch compression inlet for tool-assisted, solder-free tubing connection
• Male NPT (MNPT) threaded outlet for direct engagement with female-threaded fittings and valves
• Brass construction provides corrosion resistance and long service life in wet environments
• Part of the established 68 Series adapter line for consistent dimensional fit

Compatibility

Designed as an OEM-style replacement or standard installation fitting compatible with 3/8-inch compression-to-MNPT plumbing connections in residential and light commercial supply systems.

Installation Notes

This fitting is installed by licensed plumbers in accordance with local plumbing codes and IPC guidelines. Shut off the water supply and relieve line pressure before installation. Hand-tighten the compression nut first, then snug with a wrench — avoid overtightening, which can crack the compression ferrule or distort the brass threads. Apply thread sealant or PTFE tape to the MNPT threads before engaging the female fitting.

Technical Specifications

• Series: 68 Series
• Connection Type: Compression x MNPT
• Size: 3/8 inches
• Material: Brass

Standard Information

• Brand: BRASSCRAFT
• Manufacturer Part Number: 68-6-6X