Used on receiving set,sonar an/sqr-18a(v). 2b first mounting facility thread class 2.620" overall length 1.250" overall width 32 first mounting facility thread quantity per inch one 1.438 in. dia thru hole, two piece item irregular unc first mounting facility thread series
Used on radar set an/sps-40b fc. 2b single mounting facility thread class 9.100" overall length 1.630" overall width irregular unc single mounting facility thread series