Parker 3/4 X 1/4 Ff-s Hex Plug Mnptf 5500 Psi

Product Description

The PARKER 3/4 X 1/4 FF-S is a straight hex plug fitting designed for industrial pipe applications requiring a secure, leak-free male thread termination. Constructed from zinc-plated steel, this fitting uses an MNPTF (Male National Pipe Thread Fuel) connection and is rated to a maximum working pressure of 5,500 psi. The hex design allows for standard wrench engagement during installation and removal. At 1-3/4 inches overall length with a 1-1/8 inch hex size, it is compact enough for tight plumbing assemblies while delivering the structural integrity needed in high-pressure hydraulic, pneumatic, and fluid power systems. Licensed plumbers, pipefitters, and hydraulic technicians are the primary installers of this component.

This hex plug is suited for use in industrial fluid power systems, hydraulic lines, and high-pressure pneumatic circuits where a 3/4 inch to 1/4 inch male thread termination point is required. The MNPTF thread form provides a pressure-tight seal on fuel, oil, water, and air service lines. It is appropriate for both OEM assembly environments and field service repairs where a durable, zinc-plated steel plug is specified to cap or reduce threaded ports.

Key Features

• Rated to 5,500 psi maximum working pressure for demanding hydraulic and pneumatic service
• Zinc-plated steel construction provides corrosion resistance in industrial environments
• MNPTF thread form delivers a pressure-tight connection on fuel, oil, and air service lines
• 1-1/8 inch hex size allows engagement with standard wrenches for torque-controlled installation
• Straight fitting shape simplifies port capping and thread reduction in linear plumbing runs
• Meets SAE 140137 standards for dimensional and performance consistency

Compatibility

Designed as an OEM-style replacement or service fitting for industrial pipe assemblies using 3/4 inch to 1/4 inch MNPTF threaded ports rated to 5,500 psi.

Installation Notes

Installation should be performed by a qualified pipefitter, plumber, or hydraulic technician. Depressurize and isolate the system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape compatible with the service fluid before threading the plug into the port. Do not over-tighten; follow applicable IFGC, IPC, or system manufacturer torque guidelines for the specific service application.