Parker PQ-00073 Hydraulic Hose Coupler 5500 Psi 6 Mm

Product Description

The PARKER PQ-00073 is a stainless steel hydraulic hose coupler designed for high-pressure fluid line connections in hydraulic systems. Rated to 5,500 psi maximum working pressure, this coupler accommodates a 6 mm (3/8 inch) hose diameter and uses a 3/8-18 NPTF threaded connection for a leak-resistant, pressure-tight seal. The overall length is 1.64 inches. It belongs to Parker's ST Series and supports a maximum flow rate of 12.00 GPM. This fitting is suited for installation by hydraulic system technicians, industrial maintenance professionals, and fluid power specialists working on mobile or stationary hydraulic equipment.

The PQ-00073 is used in hydraulic plumbing applications where a reliable threaded coupler is required between hose assemblies and system components. Its stainless steel construction makes it appropriate for environments where corrosion resistance is a priority, including wash-down areas, marine-adjacent installations, and chemical-exposure settings. The NPTF thread form provides a dry-seal connection that does not rely solely on sealant tape for pressure retention, making it a practical choice for maintenance technicians who need a dependable, repeatable connection under working pressure.

Key Features

• 5,500 psi maximum working pressure for demanding hydraulic circuits
• 3/8-18 NPTF dry-seal thread eliminates reliance on thread sealant alone
• Stainless steel construction provides corrosion resistance in harsh or wet environments
• Maximum flow rate of 12.00 GPM supports standard hydraulic line sizing
• Compact overall length of 1.64 inches minimizes space requirements in tight plumbing runs
• ST Series designation for consistent Parker fitting family interchangeability

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic hose assemblies using 6 mm hose diameter with 3/8-18 NPTF threaded ports, consistent with Parker ST Series coupler specifications.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power specialist. Depressurize and lock out the hydraulic system completely before removing or installing any fittings. NPTF threads are designed as dry-seal connections; inspect threads for damage and clean mating surfaces before assembly. Do not overtighten — follow standard hydraulic fitting assembly practices per the fitting manufacturer's torque guidelines and applicable fluid power safety standards.