#4 Tube Nut - Steel

The #4 Tube Nut - Steel by FRAGOLA is a critical fastening component designed for high-pressure hydraulic and pneumatic systems in tactical, military, and law enforcement applications. This precision-engineered nut secures tubing connections in fluid power assemblies where reliability under extreme conditions is non-negotiable. Whether you're building or maintaining vehicle hydraulics, weapon systems, or equipment requiring dependable pressure-rated connections, this tube nut delivers the durability and consistency professionals demand.

Manufactured from hardened steel, the #4 Tube Nut meets industry standards for strength and corrosion resistance essential in field-forward environments. The #4 designation indicates a standard size within FRAGOLA's tube fitting system, compatible with corresponding tubing and adapter configurations. Steel construction provides superior tensile strength and thermal stability compared to alternative materials, ensuring the connection remains secure under pressure cycling, vibration, and temperature fluctuation—all common stressors in tactical equipment and military platforms. The nut's precision threading allows for consistent torque application during installation, minimizing the risk of over-tightening or leakage.

Technicians, armorers, and maintenance personnel working on hydraulic brake systems, fuel distribution networks, or pressurized fluid circuits will recognize this component as essential inventory. Installation is straightforward—apply appropriate torque wrench settings to the nut while holding the fitting body stationary, preventing system contamination or joint separation. FRAGOLA's reputation for precision manufacturing ensures compatibility with standard #4 tubing sizes and fittings across military and civilian tactical platforms. Keep these nuts on hand for repair, system upgrades, or preventive maintenance on any pressure-rated fluid system.