Used on afterbody section,torpedo mk50. 1.145" hole diameter 1.835" outside diameter 0.024" material thickness passivate surface treated spring tension
0.120" hole diameter 0.452" outside diameter 0.004" material thickness navy special project four slots in periphery, 90.0 deg apart, 0.020 in. w, 0.110 in. lg; sq flat surface, one side spring tension