Parker 4 HP5ON-S Hex Socket Plug 7/16-20 Unf 6000 Psi

Product Description

The PARKER 4 HP5ON-S is a hex socket plug designed to cap or terminate hydraulic and fluid power lines in industrial piping systems. It features a 7/16-20 male straight thread with an O-ring seal, providing a leak-resistant closure rated to 6,000 psi maximum working pressure. The hex socket drive allows installation and removal with standard hex key tooling. This fitting is manufactured to SAE standard 090109B and carries a UNF-2A thread classification. It is a common component in hydraulic circuits, fluid control manifolds, and high-pressure industrial plumbing applications where a secure, pressure-rated port plug is required.

This plug is suited for industrial hydraulic systems, fluid power assemblies, and high-pressure plumbing installations in manufacturing, mobile equipment, and process control environments. The male straight thread O-ring connection style provides a face-seal-style interface that reduces the risk of thread-initiated leakage under pressure cycling. It is typically installed by hydraulic technicians, millwrights, or pipefitters working on manifold port management or system decommissioning tasks.

Key Features

• 6,000 psi maximum working pressure rating for high-pressure hydraulic service
• 7/16-20 UNF-2A male thread for precise, standard-compliant fitment
• Male straight thread O-ring connection type provides a reliable, leak-resistant seal
• 3/16 inch hex socket drive for installation with standard hex key tools
• Meets SAE standard 090109B
• Compact, single-piece plug design for straightforward port termination

Compatibility

Designed as an OEM-style replacement or service plug for hydraulic manifolds and fluid power systems accepting 7/16-20 UNF male straight thread O-ring port connections rated to 6,000 psi.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Inspect the O-ring for damage before installation and replace if necessary. Follow SAE and system manufacturer torque guidelines for straight thread O-ring fittings to avoid over-tightening and seat damage.