www.pmmag.com/articles/88598-brass-craft-gas-connector-coating
Brass Craft Gas Connector Coating
July 15, 2003

Brass Craft offers a line of stainless-steel gas connectors featuring ProCoat[tm], a polymer coating specially designed for corrosion protection. The coating is baked onto the stainless-steel connector at high temperatures before nut assembly, for a durable, uniform coating.
Circle 19