Used on track system,target training set;nsn 6920-01-185-9279. 3.795" overall length 3.250" overall width aluminum; mtg. holes are 0.260 in. dia.; aperature is 2.960 in. dia.; differential travel, typ is 8% of semsing distance; repetition rate is 780/min.; 4 wires, 18-22 awg., stranded copper, jacketed, with jacket of pvc orbetter material; wire lg. is min. of 0.750 in.; jacket color red (+) , white (n.o.+) , green (n.c.+) , and black (-) rectangular nptf single threaded hole thread series
2b single mounting facility thread class 4.000" overall length 2.250" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series