Aluminum alloy threads coated with antiseize compound mil-t-22361, hydrostatic and pressure tests in accordance with dwg 2527261 fscm 10001, tests applicable to equipment used on 5 in. Gun mount mk 45 mod 0 in accordance with nav wep qap 3783 page 9-105, 17.719 in. Lg, 6.005 in. W, 4.218 in. H