Lewmar Ocean Series Flat Base HatchThis Lewmar Ocean Series Flat Base Hatch features a corrosion-resistant anodized aluminum frame with inset hinges, snag resistant rounded corners and a flat base and it is also composed of rugged construction for ultimate protection against the elements. The friction hinge allows for any open position without the need for support arms while the self-supporting friction levers hold the lid open in any position of up to 95. This ocean hatch will work on vessel decks, coach roofs, cockpits and transoms as defined by CE Area 2.Features: Corrosion-Resistant Anodized Aluminum Frame With Inset Hinges, Snag-Resistant Rounded Corners and Flat Base; Unique Sealing System; Full Range Of Spare Parts Available; Internal/External Lockable Handle Assemblies; Bonded Acrylic Lens, External Hinges and High-Lower Frame Breakwater; Hatch Vent Position; Simple Maintenance; Ideal for Transoms, Cockpits, Coachroofs, and Decks; Shock Resistant Acrylic Lens; Rugged Construction For The Ultimate Protection Against The Elements; Friction Hinge Allows For Any Open Position Without The Need For Support Arms; Self-Supporting - Friction Levers Hold Lid Open In Any Position Up To 95; Suitable for Design Category CE Area 2; 3 Year Limited Warranty; 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.; Flat Base Hatches Cannot Be Used With Trim Kits Or Roller Shades; Specifications:SizeAcrylic ColourAcrylic Window ThicknessLower FrameHatch WeightRadiiLengthWidthHeightHinge LengthHinge WidthCut-Out Length FlatCut-Out Width FlatCut-Out Radii Flat10Smoke Grey3/8"Flat Base5.77 lb2-15/16"12-3/4"12-3/4"1-9/16"3/16"5-7/16"10-1/16"10-1/16"1-9/16"60Smoke Grey1/2"Flat Base17.6 lb3"22-5/8"22-5/8"1-11/16"3/16"14-7/16"19-3/4"19-3/4"1-9/16"70Smoke Grey1/2"Flat Base23.8 lb3"27-5/16"27-5/16"1-11/16"3/16"19-3/16"24-1/2"24-1/2"1-9/16" Click here for Lewmar Hatch Installation Instructions