All Red Head aluminum adapters are hard-coat anodized per MIL-A-8625 Type III, Class 1. No dye or coloring is used. This process provides the completed part with a hardened surface that resists corrosion, abrasion, and reduces electrolysis. It also prevents excessive wear on the threads. Complies with NFPA 1963, 4.12 Corrosion Resistance.
Adapters with rocker lugs have: