Used on control col a; w/s: seawolf class ssn. 0.812" hole diameter 1.750" outside diameter cup spring washer is chamfered .25" deep (2x.03X45 degrees) recessed
Used on hatch ballist. 3.500" hole diameter 7.750" outside diameter 0.0937" material thickness washer is counterbore 4.5" dia; internal keyways are .5"w flat internal teeth