Parker 3 P5ON-S Hex Plug 7500 Psi 3/8-24 Male Thread

Product Description

The PARKER 3 P5ON-S is a male straight thread O-ring hex plug designed for use in hydraulic and industrial fluid systems where a secure, leak-resistant port closure is required. Manufactured from zinc-plated steel, it provides corrosion resistance suitable for demanding shop and field environments. The plug uses a 3/8-24 UNF-2A male straight thread with an O-ring sealing face, rated to a maximum working pressure of 7,500 psi. The 1/2-inch hex drive allows installation with standard hand tools. At 0.02 pounds and 0.625 inches overall length, it is a compact, high-pressure port plug suited for use by hydraulic technicians, industrial maintenance professionals, and fluid power specialists.

This plug is used to cap or block unused ports on hydraulic cylinders, manifolds, valves, pumps, and other fluid power components. It is appropriate for both mobile and stationary hydraulic systems where SAE straight thread O-ring port closures are specified. The male straight thread O-ring design provides a positive seal against the port face, making it suitable for high-pressure hydraulic circuits in industrial and mobile equipment applications.

Key Features

• Rated to 7,500 psi maximum working pressure for demanding hydraulic applications
• 3/8-24 UNF-2A male straight thread with O-ring face seal for leak-resistant port closure
• Zinc-plated steel construction for corrosion resistance
• 1/2-inch hex size for installation with standard wrenches or hex sockets
• Compact at 0.625 inches overall length for use in tight port configurations
• Meets SAE standard 090109A for straight thread O-ring fittings

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and industrial fluid power components using SAE male straight thread O-ring ports with a 3/8-24 UNF thread specification.

Installation Notes

Installation is performed by licensed fluid power technicians or qualified industrial maintenance personnel. Depressurize and isolate the hydraulic circuit fully before removing or installing port plugs. Inspect the O-ring for damage before installation and ensure the port seat is clean and free of debris. Do not overtighten — use hand-snug plus a controlled turn with a wrench and follow the equipment manufacturer's torque specification for the port size.