Parker PN251-25 Male Pipe Thread Extended Nipple 1/4 in

Product Description

The PARKER PN251-25 is a brass male pipe thread extended nipple fitting designed for hydraulic hose connections in industrial fluid systems. Part of the Parker Moldmate series, this straight, non-valved fitting features NPTF threading for leak-resistant connections without the need for additional sealant. It carries a maximum working pressure of 200 psi and handles temperatures from -20 degrees F up to 400 degrees F. The 1/4 inch hose size and 1/8 inch thread size make it a compact, purpose-built component for controlled fluid transfer. Installation is handled by hydraulic or mechanical technicians in production and tooling environments.

This fitting is specifically listed for use with die casting equipment and mold coolant lines, where reliable, leak-free connections are critical for process consistency. The Moldmate series designation indicates suitability for close-tolerance coolant circuit applications where brass construction is appropriate for compatibility with water-based and light oil coolants. The straight body configuration simplifies routing in tight manifold or hose-end installations.

Key Features

• Brass construction for corrosion resistance in coolant and light hydraulic service
• NPTF thread form provides a dry-seal connection that minimizes fluid leakage
• 200 psi maximum working pressure rated for mold coolant and die casting circuits
• Wide service temperature range: -20 degrees F to 400 degrees F
• Straight, non-valved design for straightforward hose-end or inline installation
• Part of the Parker Moldmate series for consistent fitment across tooling applications

Compatibility

Designed for use with die casting equipment and mold coolant lines as part of the Parker Moldmate series. Accepts 1/4 inch hose connections with a 1/8 inch NPTF male pipe thread end.

Installation Notes

Installation should be performed by a qualified hydraulic or mechanical technician. Depressurize and drain the system completely before removing or installing any fittings. NPTF threads are designed for dry-seal assembly, but inspect threads for damage before installation and avoid overtightening, which can crack brass fittings. Follow applicable industry standards and equipment manufacturer torque guidelines for brass pipe fittings.