2b single mounting facility thread class 3.400" overall length 1.620" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 1.460" overall length 0.930" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 2.750" overall length 1.930" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 0.406" single mounting facility thread length 4.060" overall length 0.960" overall width unc single mounting facility thread series
2a first mounting facility thread class 3.938" overall length 2.750" overall width 2 studs no. 8-32 NC2 spaced 3.375 in. c to c; studs 1/2 in. lg unf first mounting facility thread series