Case hardened for extra durability and to protect them from wear due to constant use
Ball check in the head prevents dirt and grit from getting into the fitting
Heavier wall thickness for extra strength
Zinc plated with yellow passivated finish, for maximum protection against corrosion
Stress relieved and tempered carbon steel spring
Every fitting is individually inspected and batch tested to 8,000 psi for industrial grade and to 5,000 psi for commercial grade (after-market)
Designed to meet the demanding requirements of most automotive, agricultural, industrial, marine, truck, federal, and, construction equipment needs
Thread rolled taper threads are stronger and durable due to hardening and toughening of threads; this is not achievable in a cut thread process, as the threads become brittle on the periphery
Unlike other mass-produced fittings which are fully hardened - only the tip is case hardened on Lumax® fittings
This proprietary process safeguards the female threads and protects the entire female part from being damaged
