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  Manufacturer part #: 39640050. 
 With its classic style, the Lewmar Ocean Hatch is fitted to thousands of boats around the world. Its rugged construction provides the ultimate protection against the elements, whatever conditions you might face.
  Technical Description
     Ocean Hatch Size 40
  Flat Base
  10.5 lb
 4.76 kg
  3/8 in
 10 mm
  Min Hull Thickness: 25mm. / Max Hull Thickness: 72mm.
    Lewmar Ocean Hatch Size 40 Flat Base.
 • Friction levers hold the lid open in any position up to 95°.
 • Anodised aluminium frame for corrosion resistance.
 • Full range of spare parts available.
  Lewmar Hatch Overall Dimensions
       19 1/8 in
 485 mm
  19 1/8 in
 485 mm
  1 9/16 in
 39.5 mm
  2 15/16 in
 75 mm
  3/16 in
 5 mm
  11 3/4 in
 299 mm
      Lewmar Hatch Cut-Out Dimensions*
       16 3/8 in
 416 mm
  16 3/8 in
 416 mm
  1 9/16 in
 40 mm
  Add 4mm to X1 & Y1 and 2mm to R1
 * Change if Trimkits are used.