MMC Cam-Lock Deck Covers – Butterworth
MMC deck covers for Butterworth openings are simply dropped into deck opening, then each of three helical cams is rotated one half turn to secure the unit to the deck. A self-contained, renewable O-ring gasket assures a pressure-tight seal. The overall result is a secure, oil- and water-tight closure. An MMC deck cover can be closed or opened in seconds without need for special tools. Installation requires no drilling or doubler rings and no deck studs, nuts or gaskets. MMC Deck Covers are supplied in accordance with the ship’s deck thickness. They are constructed of Navy-grade bronze with standard Buna-n seals. Other seal and cover materials are optional. Wider seal “L”-shaped gaskets are also available for use with unusually weathered deck opening surfaces.