Parker 1 X 3/4 Ff-s Hex Plug 4500 Psi Mnptf Zinc-plated Steel

Product Description

The PARKER 1 X 3/4 FF-S is a straight hex plug fitting designed for industrial pipe systems requiring a secure, pressure-rated thread termination. Constructed from zinc-plated steel, this fitting accepts a 1 inch by 3/4 inch male thread in an MNPTF (Male National Pipe Taper Fuel) connection configuration. It carries a maximum working pressure rating of 4500 psi, making it suitable for high-pressure hydraulic, pneumatic, and fluid transfer lines. The hex drive profile allows for standard wrench installation. Licensed plumbers, pipefitters, and fluid-power technicians are the primary installers of this type of fitting.

This hex plug is intended for use in industrial fluid systems where a threaded port needs to be capped or blanked off. Typical applications include hydraulic manifolds, pneumatic distribution blocks, fuel lines, and general industrial plumbing where a pressure-rated pipe plug is required. The straight fitting shape and MNPTF thread classification make it compatible with standard NPT-ported components in both shop fabrication and field service environments. The zinc-plated steel construction provides basic corrosion resistance for use in dry or mildly humid service conditions.

Key Features

• 4500 psi maximum working pressure rating for high-pressure hydraulic and pneumatic applications
• MNPTF thread connection type for use with standard NPT-ported fittings and manifolds
• Zinc-plated steel construction provides corrosion resistance in industrial service environments
• Straight hex plug shape enables full port blockoff with a single threaded component
• 1-3/8 inch hex size accepts standard wrench or socket for installation and removal
• Meets SAE 140137 standards for industrial pipe fitting applications

Compatibility

Designed as an OEM-style replacement or new-installation hex plug for industrial pipe and hydraulic systems utilizing standard MNPTF-threaded ports rated at 4500 psi or below.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or fluid-power technician. Depressurize and isolate the system completely before removing or installing any threaded plug. Apply thread sealant or PTFE tape as required by system media and applicable codes such as the IPC or IFGC. Do not overtighten tapered thread fittings, as this can crack ported housings or distort threads.