Parker PN251-40 Male Pipe Thread Extended Nipple Brass Nptf

Product Description

The PARKER PN251-40 is a male pipe thread extended nipple fitting designed for hydraulic hose and fluid transfer applications requiring a reliable threaded connection. Built from brass with an NPTF thread configuration, this straight fitting is rated for a maximum working pressure of 200 psi and handles temperatures from -20 degrees F up to 400 degrees F. The 1/4 inch body diameter pairs with a 1/8 inch thread size, making it a compact, non-valved connector suited for controlled fluid routing. Licensed plumbers, hydraulic system technicians, and industrial maintenance professionals typically install this fitting in precision fluid circuits.

This fitting belongs to the Parker Moldmate series, engineered for use with die casting equipment and mold coolant lines. Its brass construction resists corrosion in coolant-exposed environments, and the straight profile keeps plumbing runs clean and compact. The NPTF thread form provides a pressure-tight mechanical seal without relying solely on thread sealant, which reduces the risk of weeping connections in demanding thermal cycling conditions common to mold cooling circuits. It suits both original equipment assembly and field replacement in industrial production environments.

Key Features

• Brass construction for corrosion resistance in coolant and hydraulic fluid service
• NPTF thread form delivers a dry-seal, pressure-tight connection
• 200 psi maximum working pressure rating
• Wide temperature range: -20 degrees F to 400 degrees F
• Non-valved, straight configuration for straightforward inline installation
• Part of the Parker Moldmate series, optimized for die casting and mold coolant lines

Compatibility

Designed for use with die casting equipment and mold coolant lines as part of the Parker Moldmate series. Suitable for hydraulic hose assemblies requiring a 1/4 inch body diameter male pipe thread extended nipple with 1/8 inch NPTF thread.

Installation Notes

Installation should be performed by a qualified hydraulic or industrial maintenance technician familiar with NPTF threaded fittings. Shut down and fully depressurize the hydraulic or coolant circuit before removing or installing any fitting. NPTF connections are designed for dry-seal assembly, but applying an appropriate thread sealant compatible with the system fluid is common practice to ensure leak-free joints under thermal cycling. Inspect threads for damage before installation and do not over-torque, as brass fittings can be susceptible to thread deformation.