Parker 16 HP5ON-S Hex Socket Plug 5500 Psi 1-5/16-12

Product Description

The PARKER 16 HP5ON-S is a hex socket plug designed for hydraulic and industrial fluid systems requiring a secure, leak-resistant port closure. It features a male straight thread O-ring (MSTO) connection on a 1-5/16-12 UN/UNF-2A thread, providing a reliable seal against the O-ring face rather than relying on thread interference alone. Rated to 5,500 psi maximum working pressure, this plug is constructed from zinc-plated steel for corrosion resistance in demanding service environments. It is installed using a 5/8-inch hex drive and measures 3/4 inch in overall length. Hydraulic technicians and pipefitters install this plug to cap or block hydraulic ports on manifolds, cylinders, valves, and related components.

This plug is suited for use in industrial hydraulic circuits, mobile equipment hydraulics, and fluid power systems where a pressure-rated port plug is needed. The male straight thread O-ring configuration conforms to SAE standard 090109B, making it a recognized fitting type across OEM and aftermarket hydraulic assemblies. It is appropriate for both new installations and field service work on equipment requiring port blanking at pressures up to 5,500 psi.

Key Features

• 5,500 psi maximum working pressure rating for high-pressure hydraulic service
• Male straight thread O-ring (MSTO) connection per SAE 090109B for face-seal reliability
• 1-5/16-12 UN/UNF-2A male thread for precise fitment in standard hydraulic ports
• Zinc-plated steel construction for corrosion resistance in industrial environments
• 5/8-inch hex socket drive for installation with standard tools
• Compact 3/4-inch overall length suits tight port locations

Compatibility

Designed as an OEM-style hydraulic port plug for industrial and mobile fluid power systems using 1-5/16-12 male straight thread O-ring ports conforming to SAE 090109B.

Installation Notes

Installation is performed by qualified hydraulic technicians or pipefitters. Depressurize and bleed down the hydraulic system fully before removing or installing any port plug. Inspect the O-ring and seating surface for damage before torquing into place; a damaged O-ring will not seal reliably at rated pressure. Follow system manufacturer torque specifications and applicable fluid power standards when tightening.