Parker PT-00407 Hydraulic Hose Coupler Dust Cap 3/8 in

Product Description

The PARKER PT-00407 is a male threaded dust cap designed to protect hydraulic hose couplers from contamination when a hose or fitting is disconnected or stored. Constructed from steel, this straight-profile cap threads onto 3/8 inch coupler ports to seal out dirt, moisture, and debris that can degrade hydraulic fluid quality and damage sealing surfaces. At 22 millimeters in overall length and weighing just 0.01 pounds, it is a compact, low-profile solution used by hydraulic technicians and industrial maintenance professionals to maintain system cleanliness during service intervals, equipment transport, or long-term storage.

This dust cap is suited for use on hydraulic hose coupler assemblies where a 3/8 inch threaded male connection is required. It is commonly installed in mobile equipment, industrial machinery, and fluid power systems where open coupler ports must be capped between connections. The FNMK4 series designation identifies its compatibility within the Parker coupler product family. It ships in a package quantity of five, making it practical to stock on a service vehicle or at a shop for routine maintenance use.

Key Features

• Steel construction for durability in demanding hydraulic service environments
• Male threaded connection type for secure, positive engagement on coupler ports
• Straight shape with 3/8 inch thread size for straightforward installation
• 22 millimeter overall length provides a low-profile fit in tight spaces
• FNMK4 series part for use within the Parker coupler product family
• Sold in packs of five for efficient stocking and routine service use

Compatibility

Designed as an OEM-style replacement or service accessory for Parker FNMK4 series hydraulic hose couplers requiring a 3/8 inch male threaded dust cap.

Installation Notes

Installation is performed by hydraulic technicians or industrial maintenance personnel. Before capping any coupler, relieve all hydraulic system pressure and ensure the line is fully depressurized according to equipment manufacturer procedures. Thread the cap on by hand to avoid cross-threading, then snug as appropriate for the coupler port material. Inspect the cap and coupler threads for damage or contamination before reinstallation.