Highline Warren 13-537 Push-to-connect 3/8 in Fnpt Coupler

Product Description

The HIGHLINE WARREN 13-537 is a push-to-connect air coupler with a 3/8-inch female NPT (FNPT) thread connection, built to the Industrial/Milton Series standard. Push-to-connect couplers allow fast, tool-free hose connection and disconnection under pressure, reducing downtime on the job. This coupler is designed for compressed-air systems in shops, service bays, and industrial environments where reliable, repeatable connections are required. Licensed plumbers, HVAC technicians, and general maintenance trades working with pneumatic tool lines will find this coupler compatible with standard Industrial/Milton Series fittings and plugs.

This coupler is suited for general-purpose pneumatic applications including air tool lines, compressor outlets, and workshop distribution systems. The 3/8-inch FNPT inlet threads directly onto standard male pipe fittings on compressors, manifolds, and drop lines. It is appropriate for both light commercial and industrial settings where the Industrial/Milton interchange standard is the shop standard.

Key Features

• Push-to-connect mechanism allows fast hose attachment and release without tools
• 3/8-inch FNPT thread fits standard male pipe connections on compressors and distribution lines
• Industrial/Milton Series interchange — compatible with the most widely used industrial coupler standard in North America
• Compact, lightweight design at 0.365 pounds
• Minimum order quantity of one unit — available as a single replacement coupler

Compatibility

Designed as a replacement or spare coupler for pneumatic systems using the Industrial/Milton Series interchange standard with 3/8-inch FNPT connections.

Installation Notes

Installation should be performed by a qualified technician. Depressurize the air line completely before removing or installing any coupler. Apply thread sealant tape to the male NPT fitting before threading on the coupler hand-tight, then wrench-tighten to a leak-free seal — do not overtighten. Verify there is no residual pressure in the line before connecting or disconnecting hoses.