Used on 6665-01-277-8639 sampler,air particle hd-732/ud. 2b single mounting facility thread class 0.350" overall length 1.500" overall width 40 single mounting facility thread quantity per inch panel seal rectangular indicating unc single mounting facility thread series
2a single mounting facility thread class 0.312" single mounting facility thread length 1.698" overall length tap, circular, bushing mount unef single mounting facility thread series