Parker 1 Hp-s Hex Plug 1 in Mnptf 4500 Psi Zinc-plated Steel

Product Description

The PARKER 1 HP-S is a male-thread hex plug designed to seal and cap threaded pipe ports in high-pressure hydraulic and pneumatic systems. Constructed from zinc-plated steel, it provides corrosion resistance in demanding industrial environments. The plug uses an MNPTF (Male National Pipe Taper Fuel) thread form, which creates a pressure-tight mechanical seal without additional sealant, though thread tape or compound is commonly applied. With a maximum working pressure rating of 4,500 psi, this plug is suited for high-pressure fluid power and industrial piping applications. Installation requires a standard hex wrench or socket sized for the 1-5/16 inch hex. It is a plug-and-play replacement for any port requiring a 1-inch MNPTF cap.

This hex plug is used in industrial fluid power systems, hydraulic manifolds, pneumatic circuits, and pipe assemblies where an open port must be blocked or capped. It is commonly installed during system assembly, maintenance, or pressure testing when a port is unused or temporarily isolated. Trade professionals including pipefitters, millwrights, and hydraulic technicians regularly specify this fitting for both permanent and temporary port sealing on steel piping and manifold blocks rated to 4,500 psi or below.

Key Features

• MNPTF male thread creates a pressure-tight taper fit for reliable port sealing
• Maximum working pressure of 4,500 psi for high-pressure hydraulic and pneumatic service
• Zinc-plated steel construction resists corrosion in industrial environments
• 1-5/16 inch hex size allows torque application with standard wrench or socket
• Overall length of 1-1/4 inches for compact fitment in tight port locations
• 1-inch male thread size fits standard NPT pipe port configurations

Compatibility

Designed as an OEM-style replacement hex plug for industrial hydraulic, pneumatic, and pipe systems requiring a 1-inch MNPTF male-thread port cap rated to 4,500 psi.

Installation Notes

Installation is performed by licensed pipefitters, hydraulic technicians, or millwrights. Depressurize and isolate the system completely before removing or installing any threaded plug. Apply thread sealant tape or compound to the male threads per the system manufacturer and applicable code requirements before torquing into the port. Do not over-tighten; follow facility or system-specific torque procedures appropriate for the pipe material and pressure rating.