Primefit TP1414MS-B25-P 1/4-Inch Steel Male Automotive Plug Contractor Pack, 25-Piece Automotive/Truflate Style Interchange - Adapts to all Automotive/Truflate style couplers Zinc plated steel construction for corrosion resistance and longer life 1/4-Inch Body size 1/4-Inch Male NPT threads For use with air tools with Female NPT ports