Parker 3/4 X 3/8 Ptr-s Pipe Bushing 5500 Psi Mnptf X Fnptf

Product Description

The PARKER 3/4 X 3/8 PTR-S is a straight pipe reducing bushing designed to connect a 3/4-inch male NPTF thread to a 3/8-inch female NPTF thread in high-pressure fluid or pneumatic piping systems. Constructed from zinc-plated steel, it carries a maximum working pressure of 5,500 psi, making it suitable for demanding industrial and hydraulic service. The hex body accepts a 1-1/8-inch wrench for controlled installation. Overall length is 1-3/16 inches. Plumbers, pipefitters, and hydraulic system technicians install this fitting when reducing line size between threaded pipe sections or adapting components with mismatched thread sizes.

This bushing fits straight inline reduction applications where a larger male NPT port must be reduced to accept a smaller female NPT connection. Typical use cases include manifold port reduction, pump and valve inlet adaptation, and hydraulic power unit plumbing. The MNPTF x FNPTF thread form provides a pressure-tight mechanical seal without relying solely on thread sealant, though applying an appropriate thread sealant compound is standard practice. It is suited for both industrial plant piping and mobile hydraulic equipment installations.

Key Features

• 5,500 psi maximum working pressure for high-pressure hydraulic and fluid power service
• Zinc-plated steel construction resists corrosion in typical shop and industrial environments
• MNPTF x FNPTF connection type delivers a pressure-tight threaded seal
• Straight bushing profile allows in-line thread size reduction without altering flow path direction
• 1-1/8-inch hex drive enables standard wrench installation and removal

Compatibility

Designed as an OEM-style replacement or service fitting for threaded pipe systems using 3/4-inch male NPTF and 3/8-inch female NPTF connections in industrial, hydraulic, and fluid power applications.

Installation Notes

Installation is performed by licensed pipefitters, plumbers, or hydraulic technicians. Depressurize and isolate the system fully before removing or installing any threaded fitting. Apply a compatible thread sealant or PTFE tape to the male threads per the sealant manufacturer instructions and applicable plumbing or hydraulic system codes. Do not over-torque; use a properly sized 1-1/8-inch wrench and tighten to snug plus a controlled number of turns consistent with NPTF thread engagement practice.