Midland Industries 129A-391FC3-BN Brass Bulkhead Connector

Product Description

The MIDLAND INDUSTRIES 129A-391FC3-BN is a brass bulkhead connector with nut designed to pass fluid lines through a panel, bulkhead, or enclosure wall. It features a 1/4-inch Female NPTF inlet on one side and a 1/2-inch Male NPTF outlet on the other, joined by a 1-14 UNS thread nut that secures the fitting to the mounting surface. Overall length is approximately 2.85 inches. Plumbers, pipefitters, and fluid system technicians install this fitting where a sealed, through-wall connection is required in compressed air, hydraulic, or fluid distribution systems.

This bulkhead connector is suited for residential and light commercial applications where a fluid line must transition through a panel or tank wall. The NPTF thread form provides a dry-seal connection on both ports, reducing the risk of thread-joint leakage without relying solely on sealant tape. The 1-14 UNS nut thread is a standard bulkhead mounting thread, compatible with typical panel thicknesses found in control enclosures, tanks, and manifold assemblies.

Key Features

• 1/4-inch Female NPTF x 1/2-inch Male NPTF configuration allows through-panel line routing with mismatched port sizes
• 1-14 UNS bulkhead nut thread for secure panel mounting
• NPTF dry-seal threads on both ports minimize reliance on thread sealant
• Solid brass construction offers corrosion resistance in water, air, and compatible fluid service
• Compact footprint: 2.85 inches long, 1.45 inches wide, 1.45 inches tall

Compatibility

Designed as an OEM-style replacement or new-installation bulkhead fitting for fluid systems requiring a 1/4-inch Female NPTF inlet, 1/2-inch Male NPTF outlet, and a 1-14 UNS panel-mount thread.

Installation Notes

Installation is performed by licensed plumbers or qualified fluid system technicians. Shut off and depressurize the system completely before removing or installing any fitting. Verify panel thickness and hole diameter are compatible with the 1-14 UNS nut before mounting. Apply thread sealant per job specifications even with NPTF threads when system pressure or fluid type requires it, and torque connections using the fitting flats rather than the body.