Ocean series 60 Hatch with (1in) Flange. Product Description: With its classic style, the Ocean Hatch is fitted to thousands of boats around the world. Its ruggedconstruction provides the ultimate protection against the elements, whatever conditionsyou might face. All sizes suitable for CE Area 2 (Deck, Coachroof, Cockpit and Transom). Mounting Instructions: Fit to a flat surface with a maximum tolerance of +/- 1mm. Fastening size at hinge section use (M6 / 1/4"). Fastening size for lower frame use 5mm CSK screw No.10 UNC 2 BA.