Parker 3/8 Hhp-s Hollow Hex Plug 3/8 in Mnptf 6000 Psi

Product Description

The PARKER 3/8 HHP-S is a hollow hex plug designed for industrial pipe systems requiring a reliable threaded closure. Manufactured to accept a 3/8 inch male MNPTF (Dryseal National Pipe Taper Fuel) thread connection, this plug is rated to a maximum working pressure of 6000 psi, making it suitable for high-pressure hydraulic and pneumatic lines. The hollow hex drive design allows installation and removal with a standard hex key. Overall length is 7/16 inches and hex size is 5/16 inches. Licensed plumbers, pipefitters, and hydraulic system technicians install this fitting as part of pressure line assemblies, test port closures, or system cap-offs.

This plug is intended for industrial pipe and fluid power applications where a male MNPTF threaded closure is required. Common use cases include sealing unused ports on manifolds, hydraulic valve bodies, and high-pressure fluid distribution blocks in both fixed and mobile equipment environments. The 6000 psi pressure rating makes it appropriate for demanding hydraulic service. Its compact dimensions allow installation in space-constrained port locations.

Key Features

• 6000 psi maximum working pressure rating for high-pressure hydraulic and pneumatic service
• 3/8 inch MNPTF male thread connection for dryseal pipe thread fitment
• Hollow hex drive design — 5/16 inch hex size — for installation with a standard hex key
• Compact overall length of 7/16 inches suits tight port access
• Single-piece construction suitable for port sealing on manifolds and valve bodies

Compatibility

Designed as an OEM-style replacement or service fitting for industrial pipe and fluid power assemblies requiring a 3/8 inch MNPTF male threaded hollow hex plug rated to 6000 psi.

Installation Notes

Installation is performed by a licensed pipefitter, hydraulic technician, or plumber depending on the application. Depressurize and isolate the system completely before removing or installing any threaded pipe plug. Use a correctly sized 5/16 inch hex key to avoid rounding the drive. Follow applicable industry standards and torque practices for MNPTF dryseal thread connections — thread sealant use should follow the system fluid and pressure requirements per manufacturer guidance.