Milton M-style Kwik-Change couplers and plugs will interchange with all manufacturers who comply with the dimensional requirements of military specification MIL-C-4109. • M-style coupler bodies are brass with brass sleeves • M-style plugs are case hardened steel, plated to resist rust • Maximum inlet pressure: 300 PSI • Maximum temperature: 250° F • Air flow: 40 SCFM • Seals: Buna-N