Aluminum alloy threads coated with antiseize compound mil-t-22361, hydrostatic and pressure tests in accordance with dwg 2527199 fscm 10001, tests applicable to equipment used on 5 in. Gun mount mk 45 mod 0 in accordance with nav wep qap 3783 page 10-111, 6.480 in. Lg, 3.688 in. W, 3.750 in. H, 2 ea ports