Used on virginia class submarine, ssn-774;sturgeon class ssn (637);marine hardxware & hull doors;los angeles class ssn (688);level 1 / subsafe;submarine surveillance systems;type 2 periscope;periscope, type 18;austin ship class lpd-4 amphibious transport docks;fire pumps;helicopter, advance attack, ah-1w;landing craft air cushion (lcac);helicopter, carrier based asw, sh-60f;oliver perry class ffg;emory s. land class as;fms - knox class ff. 0.201" hole diameter 0.437" outside diameter 0.050" material thickness shouldered
1.769" hole diameter 2.703" outside diameter 0.238" material thickness navy special project periphery of greater o.d. has 0.219 in hole 0.375 in deep shouldered