2b single mounting facility thread class 9.500" overall length 2.531" overall width 20 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 6.250" overall length circular wafer, bushing mount unef single mounting facility thread series
Used on type no. rt-178/arc-27. 2b single mounting facility thread class 1.500" overall length 0.750" overall width unc single mounting facility thread series
2.8125" overall length 1.188" overall width ostationary contacts 2; moving contact assy 1; disk, thermostat 1; reset rod 1; rest spring 1; one 0.169 in. dia mtg hole located 11/32 in. to the right of the vertical ctr line