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.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.