T-H Marine HAT-1115-2-DP
15 × 11 in HAT series hatch
Corrosion-resistant integral hinge; lid opening of about 160 degrees.
View hatch detailsT-H Marine Boat Storage Access Hatches: HAT vs HDS Cutout Sizes
T-H Marine Boat Access Hatches: Check the Cutout Before Replacing
Two access hatches may both measure 15 × 11 inches on the outside yet require different holes in the deck. The HAT and HDS families have different lid and closure designs. This guide helps compare three exact T-H Marine parts by overall size, listed cutout and opening style.
Measure the existing hatch in three places
Overall frame dimensions
Measure the outside width and length of the mounted flange. A 15 × 11-inch outside frame doesn't establish the deck cutout size.
Actual deck cutout
With the original hatch accessible, compare the clear opening in the deck against the listed cutout dimensions for the exact part.
Door swing and mounting
Check lid opening clearance, hinges, fastener positions, gasket condition and the surrounding structure before replacing the entire frame.
Important: HAT-1115-2-DP and HDS-1115-2-DP both have nominal 15 × 11-inch outside frames, but their cutouts differ by 1/2 inch in both directions. Do not assume they are direct replacements without checking the opening.
T-H Marine storage hatch part number comparison
| Manufacturer MPN | Overall size | Listed deck cutout | Lid and closure |
|---|---|---|---|
| HAT-1115-2-DP | 15 × 11 in | 12⅝ × 8¾ in | Lid-over-frame, hinged |
| HDS-1115-2-DP | 15 × 11 in | 12⅛ × 8¼ in | Cam-latch, overlapping sealed lid |
| HDS-1317-2-DP | 17 × 13 in | 14⅛ × 10⅛ in | Cam-latch, overlapping sealed lid |
What separates the HAT and HDS models?
HAT-1115-2-DP: A polar-white access hatch with an integral corrosion-resistant hinge, an overlapping lid and approximately 160-degree opening range. It has an outside size of 15 × 11 inches, with a listed cutout of 12⅝ × 8¾ inches.
HDS-1115-2-DP: A nominally similar 15 × 11-inch polar-white hatch, but it belongs to the cam-latch, positive-lid-seal family, with concealed frame fasteners. Its listed cutout is 12⅛ × 8¼ inches.
HDS-1317-2-DP: A larger 17 × 13-inch HDS cam-latch hatch, with a listed 14⅛ × 10⅛-inch cutout. It shares the HDS-style closure but requires a bigger opening than the 15 × 11 version.
All three listings are non-locking polar-white plastic access hatches. If theft resistance matters, do not assume the cam closure is a keyed lock. Verify a separate lockable version by its exact manufacturer part number.
Find the matching T-H Marine hatches
T-H Marine HDS-1115-2-DP
15 × 11 in HDS series hatch
Cam-style closing system, concealed fasteners and positive lid seal.
View hatch details
T-H Marine HDS-1317-2-DP
17 × 13 in HDS series hatch
Larger HDS cam-latch version with sealed cover and concealed fasteners.
View hatch detailsInstallation and sealing checks
Confirm that the new mounting flange fully covers the existing opening, without hiding structural damage. Check for wiring, hoses, flotation material or reinforcements before drilling. Support the surrounding deck as needed, follow the hatch manufacturer's mounting and sealant instructions, and test that the lid closes properly.
For smaller round access openings rather than rectangular storage compartments, see our T-H Marine deck plate identification guide. For another manufacturer's removable deck plate designs, browse our Sea-Dog screw-out deck plate reference.
Frequently asked questions
Will a 15 × 11 HDS hatch replace a 15 × 11 HAT hatch?
Not automatically. Their published cutout dimensions differ. Compare the original opening and frame mounting requirements before ordering.
Does overall hatch size equal the opening I need to cut?
No. Overall size includes the frame. The deck cutout is smaller and varies between the HAT and HDS models.
Are these three versions lockable?
The listed part numbers are non-locking versions. A cam-style closure is not the same as a keyed lock.
Can I view or collect a hatch locally?
UsedRVParts offers viewing and pickup by appointment in Kelowna. Confirm availability and arrange the appointment before visiting.
Quick links: HAT-1115-2-DP · HDS-1115-2-DP · HDS-1317-2-DP
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