0.250" single connection inside diameter 3.500" overall length 3.500" overall width 14 single pressure connection thread quantity per inch rectangular w/bracket npt single pressure connection thread series
2a single mounting facility thread class 1.531" overall length 1.531" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 1.750" overall length 1.320" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series