Bomar reports that there are two different size gaskets used on the cast aluminum hatch. You must measure the gasket channel to determine if this is the correct size for your hatch. This part is for the more common 1/2" version. There is a, less common, larger 9/16" version available, by special order. Call our technical support line to get more details on availability.

Below are pictures of an aluminum hatch and gasket on a 1982 Catalina 30.

Dimensions of Hatch:
• Outside of deck flange: 12-3/8" x 12-3/8" (about 305mm x 305mm)
• Outside of lid: 12-3/8" x 12-3/8" (about 305mm x 305mm)
• Cut out in the deck: 10" x 10" (about 253mm x 253mm)
• Cutout radius: 3/4" (about 19mm)
• Height off of deck: 2" (about 51mm)

Known Usage:
• Catalina 27
• Catalina 30
• Catalina 320
• Catalina 34
• Catalina 36
• Catalina 42

There may be other instances where this hatch is used. It is also possible that not every boat described above used this hatch. Please use the dimensions above and the photos below to verify which hatch is actually installed on your boat.

1) This is a cut to order part. You provide the information we need to cut this product for you. Once you order it we are going to cut it just for you, just as you asked. We never want to see it again, and no one else wants it either. So be careful and order it correctly the first time because it can't be canceled, returned, or magically changed into something different!

2) We have found that the supplied adhesive backing to be wanting or with time between shipping, receiving, and installing, may not be up to the task for bonding to the frame and suggest using Weatherstrip Adhesive, our Z2294, or similar if needed.Bomar 130