... galvanized, all be antirust treatment. 6. Pipe Fitting Usage: Suitable for joining pipe lines of water, gas, oil, air. ... ribs Connection: Female Type: Coupling Technics: Casting, malleable Pipe Fitting Surface finishing: Black, Hot dipped galvanized, Electrical galvanized Kind ... Threads: ISO 7/1 ITEMMATERIAL GALVANIZED THREADS AVAILEBLE SIZE Pipe fitting ASTM A-197, EN1562, ISO5922 ASTM A153, ISO1460 ...