Parker 6MSC6N-316 Compression Tube Connector 3/8-18 Npt

Product Description

The PARKER 6MSC6N-316 is a stainless steel compression tube connector designed to join tubing to a male NPT threaded port in fluid and gas distribution systems. It features a 3/8-18 NPT thread with a compression-to-MNPT end configuration, allowing a reliable mechanical seal without welding or brazing. Rated to 6600 psi maximum working pressure and capable of operating across an extreme temperature range, this connector suits demanding industrial, instrumentation, and process piping applications. Licensed plumbers, pipefitters, and instrumentation technicians are the typical installers. At 1.57 inches overall length and approximately 0.11 pounds, it is a compact, single-piece fitting built for high-integrity connections.

This connector is well suited for high-pressure tubing runs in industrial process systems, hydraulic lines, pneumatic instrumentation circuits, and chemical distribution where stainless steel corrosion resistance is required. Its compression-by-male-NPT configuration makes it a common choice when connecting tubing to threaded valve bodies, manifolds, or equipment ports. The fitting handles both cryogenic service down to -425 degrees F and elevated-temperature process lines up to 1200 degrees F, broadening its range across specialty applications including cryogenics, steam-adjacent services, and high-temperature instrumentation.

Key Features

• Stainless steel construction provides corrosion resistance for aggressive media and outdoor or wet environments
• 6600 psi maximum working pressure rating suitable for high-pressure process and hydraulic service
• Wide temperature range from -425 degrees F to 1200 degrees F covers cryogenic through high-heat applications
• Compression x MNPT end configuration allows direct connection of tubing to NPT-threaded ports without welding
• 3/8-18 NPT thread size is a common standard fitting used across industrial and instrumentation systems
• Compact 1.57-inch overall length minimizes space requirements in tight manifold or panel installations

Compatibility

Designed as an OEM-style replacement or new-installation compression connector for systems using 3/8-inch outside diameter tubing with 3/8-18 NPT male threaded port interfaces, conforming to NPT thread standard fittings.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or instrumentation technician familiar with compression fitting assembly procedures. De-pressurize and isolate the system completely before removing any existing fittings or beginning installation. Compression fittings require proper tube squareness and a clean cut end for a leak-free seal — do not over-tighten, as excessive torque can deform the ferrule and compromise the connection. Follow applicable codes including ASME B31.3 for process piping where required.