Parker 21KAIN10MPN Pneumatic Coupler 1/8-27 Female Npsf Brass

Product Description

The PARKER 21KAIN10MPN is a high-flow pneumatic coupler from the Parker 21 Series, designed for use in compressed air and pneumatic tool systems. Constructed from brass with a threaded female NPSF connection, this coupler features a 1/8-27 thread size and a body diameter of 0.125 inches. It is rated for a maximum working pressure of 250 psi and operates across a temperature range of -4 degrees F to 212 degrees F. The 21KAIN10MPN is a single-unit component installed by maintenance technicians, pipefitters, and pneumatic system specialists in both light industrial and commercial applications.

This coupler is suited for pneumatic hose assemblies and quick-connect systems where high-flow performance is required. Its brass construction makes it appropriate for dry compressed air lines in workshop, manufacturing, and maintenance environments. The threaded female NPSF interface ensures a secure, leak-resistant connection to compatible male fittings. It is typically used where a reliable coupler-to-tool or coupler-to-hose connection is needed at the 1/8 inch port size.

Key Features

• High-flow interchange type for improved air volume delivery
• Female NPSF threaded connection, 1/8-27 thread size
• Brass body construction for corrosion resistance in air service
• Rated to 250 psi maximum working pressure
• Wide operating temperature range: -4 degrees F to 212 degrees F
• Compact 0.55 inch hex size for easy wrench installation

Compatibility

Designed as an OEM-style replacement coupler for pneumatic hose and quick-connect systems using the Parker 21 Series high-flow interchange standard with 1/8-27 female NPSF threaded ports.

Installation Notes

Installation should be performed by a qualified technician or pipefitter familiar with pneumatic system assembly. Depressurize and isolate the air supply before servicing any fittings or couplers. Use an appropriate wrench on the hex to achieve a snug, leak-free connection; do not overtighten brass fittings. Apply thread sealant or PTFE tape as required by the applicable piping code for the installation.