Parker 4MSC6N-B Compression X Mnpt Connector 3/8 in

Product Description

The PARKER 4MSC6N-B is a brass compression tube connector designed to join 3/8-inch compression tubing to a male NPT threaded port. It provides a reliable, leak-resistant mechanical seal without requiring solder, flare tools, or thread sealant on the compression side. Rated to 3500 psi maximum working pressure, this fitting is built to handle demanding fluid and gas transfer applications. Constructed to ASME-SB75 and ASTM-B75 brass standards, it delivers consistent material quality for use in hydraulic, pneumatic, instrumentation, and plumbing systems. The overall length is 1.51 inches. Licensed plumbers, pipefitters, and instrumentation technicians are the typical installers.

This connector suits residential and commercial applications where a tubing line must terminate into or connect through an NPT-threaded port. Common use cases include instrument tubing hookups, refrigeration and HVAC gauge connections, compressed air distribution, and hydraulic control lines. The compression end accepts standard copper or compatible alloy tubing, while the male NPT thread connects directly to valves, manifolds, gauges, or bulkhead fittings. Its compact 1.51-inch body makes it practical in tight-clearance panel and equipment installations.

Key Features

• 3500 psi maximum working pressure for high-demand fluid and gas service
• Compression x MNPT end connections eliminate the need for soldering on the compression side
• Brass construction meets ASME-SB75 and ASTM-B75 material standards
• 3/8-inch MPT thread size for direct connection to standard NPT-ported components
• Compact 1.51-inch overall length fits restricted installation spaces

Compatibility

Designed as an OEM-style compression-to-MNPT connector for use with standard 3/8-inch compression tubing in hydraulic, pneumatic, instrumentation, and plumbing systems where an NPT-threaded port interface is required. Cross-references to Swagelok part number B-400-1-6.

Installation Notes

Installation is typically performed by a licensed plumber, pipefitter, or instrumentation technician. Depressurize and isolate the line completely before disassembly or fitting installation. Hand-tighten the compression nut onto the tubing, then advance with a wrench to the manufacturer-recommended engagement — do not overtighten, as brass compression fittings can be damaged by excessive torque. Apply thread sealant or PTFE tape to the male NPT threads in accordance with applicable plumbing or mechanical codes before threading into the mating port.