Parker 4MSC8N-B Compression Tube Connector 1/2 Inch

Product Description

The PARKER 4MSC8N-B is a brass compression tube connector designed to join tubing to a male NPT threaded port in plumbing, HVAC, and fluid-system applications. It provides a leak-resistant mechanical seal using a compression fitting on one end and a 1/2-inch male NPT thread on the other. Constructed from ASME-SB75 and ASTM-B75 compliant brass, this connector handles working pressures up to 3,500 psi, making it suitable for demanding service conditions. Licensed plumbers, HVAC technicians, and fluid-system specialists install this type of fitting where a tubing run must terminate or transition to a threaded pipe connection.

This connector suits residential and commercial installations where copper or compatible soft tubing must connect to a male NPT port on valves, manifolds, gauges, or equipment panels. The compression-by-MNPT configuration is common in refrigerant line sets, pneumatic controls, hydraulic instrumentation, and general plumbing service. At 1.76 inches overall length, it fits in tight panel or valve-body spaces. It ships and is sold as a single unit.

Key Features

• Compression x MNPT end connections allow tubing to thread-port transitions without soldering
• Rated to 3,500 psi maximum working pressure for demanding fluid and gas service
• ASME-SB75 and ASTM-B75 compliant brass construction for corrosion resistance
• 1/2-inch MPT thread size fits standard NPT pipe and valve ports
• Compact 1.76-inch overall length suits tight installation spaces

Compatibility

Cross-references with Swagelok part number B-400-1-8. Designed as an OEM-style replacement or direct-install compression connector for systems requiring a 1/2-inch MNPT to compression tube fitting in brass.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician following applicable IPC or IFGC requirements. Shut off and depressurize the system completely before removing or installing any compression fitting. Do not overtighten the compression nut — use a wrench to snug the nut after hand-tight, following standard compression fitting practice without exceeding fitting body limits. Inspect the tubing end for burrs or ovality before seating against the ferrule.