Parker 3/8 Hp-s Hex Plug 3/8 Inch Mnptf 6000 Psi

Product Description

The PARKER 3/8 HP-S is a hex plug fitting designed to seal open pipe ports in hydraulic, pneumatic, and industrial fluid systems. It uses a 3/8-inch male MNPTF (Dryseal) thread to form a pressure-tight seal without the need for additional sealant tape in many applications. Constructed from zinc-plated steel, the part is rated for a maximum working pressure of 6,000 psi, making it suitable for high-pressure line termination. A licensed plumber, pipefitter, or hydraulic technician typically installs this fitting during system assembly or maintenance.

This hex plug is used in industrial piping systems where a threaded port must be capped or blanked off. Typical applications include hydraulic manifolds, pneumatic distribution blocks, and high-pressure fluid lines found in both commercial and industrial settings. The 11/16-inch hex drive allows installation with a standard wrench, and the 3/4-inch overall length keeps the installed profile compact in tight panel or manifold layouts.

Key Features

• 6,000 psi maximum working pressure rating for high-pressure system use
• 3/8-inch MNPTF dryseal male thread for pressure-tight port sealing
• Zinc-plated steel construction provides corrosion resistance in industrial environments
• 11/16-inch hex size accepts standard wrench or socket drive
• 3/4-inch overall length supports compact installation in manifolds and distribution blocks

Compatibility

Designed as an OEM-style pipe fitting for industrial fluid systems requiring a 3/8-inch MNPTF hex plug to seal threaded ports at working pressures up to 6,000 psi.

Installation Notes

Installation should be performed by a qualified pipefitter, hydraulic technician, or licensed plumber following applicable codes such as IFGC or ASME B31 where relevant. Depressurize and isolate the system completely before removing or installing any threaded fitting. Apply thread sealant according to system fluid compatibility requirements, noting that MNPTF dryseal threads are engineered for metal-to-metal sealing but sealant may still be required per system specifications. Do not overtighten, as this can crack the fitting or damage the mating port threads.