Midland Industries 5406C4 Pipe Cap 1/4 in Female Nptf Steel

Product Description

The MIDLAND INDUSTRIES 5406C4 is a steel pipe cap designed to seal the end of a 1/4-inch female NPTF threaded port in hydraulic and high-pressure fluid systems. Built to handle up to 4000 psi and rated for operating temperatures up to 375 degrees F, this cap provides a reliable, leak-resistant closure for unused or capped-off ports. It carries a 1/4-18 thread specification, standard for NPTF connections in hydraulic plumbing. The all-steel construction makes it well suited for demanding service environments where durability and pressure integrity are required. Hydraulic technicians, pipefitters, and plumbing professionals install this type of cap when decommissioning a port, staging a system for service, or completing a hydraulic circuit.

The 5406C4 is used in hydraulic circuits, fluid power systems, and industrial piping assemblies where a 1/4-inch female NPTF port requires a secure, high-pressure seal. Common install scenarios include hydraulic power units, manifolds, cylinders, and steel pipe adapter assemblies. Its compact dimensions allow installation in tight spaces on valve blocks and distribution manifolds. This cap is part of the 5406-CAP Series of steel pipe adapters and is a standard component in hydraulic system maintenance and repair kits.

Key Features

• Rated for 4000 psi maximum operating pressure for demanding hydraulic applications
• 375 degrees F maximum operating temperature rating
• Female NPTF connection with 1/4-18 thread size for a pressure-tight seal
• All-steel construction for durability in hydraulic and fluid power service
• Compact profile - 0.8 inches height, 0.65 inches length, 0.75 inches width

Compatibility

Designed as an OEM-style replacement or service component for hydraulic systems and steel pipe adapter assemblies using 1/4-inch female NPTF threaded ports rated to 4000 psi.

Installation Notes

Installation is performed by licensed pipefitters, hydraulic technicians, or qualified maintenance personnel. Always depressurize and lock out the hydraulic system before removing or installing any pipe cap. Apply thread sealant appropriate for NPTF connections and the system fluid type. Follow applicable industry codes for hydraulic piping and fluid power installations.