2a single mounting facility thread class 0.250" single mounting facility thread length 3.077" overall length 2.500" overall width mil type no. SR15N15C3MG0 tap, square frame unef single mounting facility thread series
Used on an/usm-381 25788. 2a single mounting facility thread class 0.375" single mounting facility thread length 1.943" overall length 1.125" overall width circular wafer, bushing mount unef single mounting facility thread series
Used on switch limit 27192. 2b single mounting facility thread class 2.460" overall length 1.540" overall width tap, circuit selector unf single mounting facility thread series