Used on main ballast tank vent valvel;los angeles class ssn 688. 2.000" center hole diameter gland packing self-lubricating 4 bolt holes eq spaced size 0.406
Used on retractable bow plane diving ram cylinder zero lk. 4.540" center hole diameter gland packing outer 8has 6 bolt holes 0.654-0.665; bolt holes equally spaced ceterted at 8.000 diameter; has 6 u shaped cut outs between bolt holes; top of u cut out is 1.50in
Used on los angeles class ssn (688). 2.1265" center hole diameter gasket retainer contains 6 bolt holes on a 2.875 in. circle which are drilled thru .281" in dia.