Parker PT-00408 Hydraulic Hose Coupler Dust Cap Steel

Product Description

The PARKER PT-00408 is a male-threaded hydraulic hose coupler dust cap designed to protect hydraulic coupler ports from contamination, debris, and moisture when a hose assembly is disconnected or stored. Constructed from steel, this straight-body cap fits hoses with a 0.5 inch inside diameter and a 0.5 inch outside diameter, with a 1/2 inch thread size. It installs quickly by hand onto open coupler ends and is part of the FNMK4 series. Hydraulic technicians and fluid-power specialists use this cap to maintain system cleanliness and prevent port damage during service, transport, or equipment downtime.

This dust cap is suited for use in industrial hydraulic systems where open coupler ends must be sealed between connections. Typical applications include mobile hydraulic equipment, stationary hydraulic power units, and fluid-transfer assemblies. The male threaded connection and straight shape make it a straightforward fit for standard coupler port configurations encountered in both shop and field service environments.

Key Features

• Steel construction for durability in industrial hydraulic environments
• Male threaded connection with straight body profile for direct coupler port seating
• 1/2 inch thread size fits 0.5 inch ID, 0.5 inch OD hose assemblies
• Overall length of 22 millimeters keeps the cap compact and low-profile on open ports
• Part of the FNMK4 series for consistent fitment across compatible coupler families
• Sold in packages of 5, minimum order quantity of 1 package

Compatibility

Designed as an OEM-style replacement or service cap for hydraulic coupler ports in the FNMK4 series requiring a 1/2 inch male threaded dust cap with a straight body profile.

Installation Notes

Installation is performed by hydraulic technicians or fluid-power service personnel. Before removing or capping any hydraulic coupler, depressurize the hydraulic circuit fully and wipe the port clean to avoid introducing contaminants. Thread the cap onto the coupler port by hand until snug, using a wrench only if required to achieve a proper seal without over-tightening. Follow applicable industry safety standards for hydraulic system service when working with pressurized circuits.