Masthead truck casting only for later, flat sided masts used on the Catalina 22. This masthead comes with 2 sheaves that are used for internal halyards. If you want to upgrade to external halyards please see the other two options, either 4 of D1885 if your external halyards are all line or 4 of D1214 if your halyards are wire and you will need a masthead divider plate D1921.
Dimensions of portion of the casting that slides into the mast extrusion:
Outside dimensions of mast extrusion this masthead is intended to fit:
Note: Flat sided masts were original equipment on boats built after 1979. Check your mast carefully before ordering to confirm you have the flat sided mast.