Check the listing for details. Universal 1/4" Female NPT Air Compressor Hose Quick Connect Coupler Socket. Condition: New. Listed at 9.95 USD. Upgrade your air tool setup with this high-quality Universal Steel Air Quick Connect Coupler, designed for ultimate compatibility and ease of use. Featuring a durable steel body and an O-ring seal, this 1/4" body coupler with 1/4" female NPT connection is engineered to accept multiple plug styles—including Milton M-Style (Industrial Interchange), ARO Style, and Automotive Type plugs.Upgrade your air tool setup with this high-quality Universal Steel Air Quick Connect Coupler, designed for ultimate compatibility and ease of use. Featuring a durable steel body and an O-ring seal, this 1/4" body coupler with 1/4" female NPT connection is engineered to accept multiple plug styles—including Milton M-Style (Industrial Interchange), ARO Style, and Automotive Type plugs.