Parker 1 Ff-s Hex Plug 1 Inch Mnptf 4500 Psi

Product Description

The PARKER 1 FF-S is a straight hex plug fitting designed to seal hydraulic and pneumatic pipe ports in industrial fluid-power systems. It uses a 1-inch male MNPTF (Dryseal) thread and is rated to 4,500 psi maximum working pressure. The body is zinc-plated steel, which provides corrosion resistance suitable for most industrial service environments. With an overall length of 2-5/16 inches and a 1-3/8-inch hex, it accepts standard wrenching without special tooling. This fitting is installed by maintenance technicians and fluid-power specialists performing system assembly, port plugging, or pressure testing on hydraulic and pneumatic lines.

This hex plug is suited for industrial applications where an MNPTF port must be sealed against high-pressure fluid or gas. Typical scenarios include capping unused ports on hydraulic manifolds, valve bodies, cylinders, and pumps. The straight fitting geometry makes it a direct thread-in installation with no additional fittings or adapters required. It meets SAE standard 140137 and carries a pressure rating appropriate for most medium- to high-pressure industrial hydraulic circuits operating up to 4,500 psi.

Key Features

• 1-inch MNPTF (Dryseal) male thread seals without a separate thread sealant tape in many applications
• 4,500 psi maximum working pressure rating per SAE 140137
• Zinc-plated steel construction for corrosion resistance in industrial environments
• Straight hex plug geometry for direct port sealing with no additional hardware
• 1-3/8-inch hex drive accepts standard open-end or box wrenches
• Overall length of 2-5/16 inches fits typical manifold port depths

Compatibility

Designed as an OEM-style replacement or service fitting for industrial hydraulic and pneumatic systems using 1-inch MNPTF threaded ports, conforming to SAE standard 140137.

Installation Notes

Depressurize and isolate the hydraulic or pneumatic circuit completely before removing or installing any port plug. A licensed fluid-power technician or qualified maintenance professional should perform this work in accordance with applicable OSHA lockout/tagout procedures. Use a properly sized open-end or combination wrench on the 1-3/8-inch hex; do not use pipe wrenches, which can distort the hex. Inspect the mating port threads for damage or contamination before installation.