FMSI Fittings 3414HP High-Pressure Steel Compression Union Fitting

The FMSI Fittings 3414HP is a high-pressure steel compression union fitting engineered for demanding fluid power applications including brake lines, power steering, transmission, and fuel systems. Part of FMSI Automotive Hardware's 34xx-series high-pressure compression union line, the 3414HP is built to handle working pressures up to 1,200 PSI with a burst pressure rating of 5,000 PSI, making it suitable for critical hydraulic and fluid-carrying line repairs.

Key Features:

• 5,000 PSI burst pressure rating for high-pressure system confidence
• 360° seal captive-sleeve compression design for reliable, leak-free connections
• Compatible with steel, copper, aluminum, and nylon tubing — a single part number covers multiple tube material combinations
• Precision-machined steel construction for long-term durability in harsh underhood environments
• In-line (straight) union configuration for direct line repair and extension
• Designed to meet or exceed OEM standards for automotive fluid-carrying systems

FMSI Automotive Hardware has been a trusted supplier in the automotive aftermarket fluid-carrying line segment for over 25 years. The 3414HP compression union simplifies line repairs by eliminating the need for flaring tools — the captive sleeve design creates a secure 360-degree seal on contact. Always confirm tube size and system pressure requirements against your application before installation.