Finding a replacement Sea-Dog hinge begins with the leaf shape, open dimensions and screw pattern. A small mortised butt hinge, a front-mounted offset hinge and a right-handed lift-off hinge can all look similar from the outside of a cabinet or hatch. Compare the original part number and mounting arrangement before making another hole in the door.
Recognize how the hinge attaches
201070, 201080, 201081, 201580 and 201582 all use recessed rectangular leaves, but their footprints are different.
201590-1 has a ⅜-inch offset on one side and mounts on the front of a raised door, not as an ordinary flat butt hinge.
204279-1 uses chrome-plated forged brass. Its right-handed, two-piece design allows a suitable door or lid to lift off without unscrewing the hinge.
205310-1 is investment-cast 316 stainless steel, with one shorter leaf for installations where the available mounting area is tight.
Sea-Dog hinge MPN and dimension reference
The measurements are nominal overall open-hinge references. Match the actual manufacturer's drawing and existing hole arrangement; similar nominal dimensions are not evidence of an identical drilling pattern.
| MPN | Hinge design | Construction | Nominal size | Handing or offset | Fastener reference |
|---|---|---|---|---|---|
| 201070-1 | Butt hinge | Stamped 304 stainless steel | 1¼ × 1½ in | Not handed | Four #8 flat-head screws |
| 201080-1 | Butt hinge | Stamped 304 stainless steel | 2 × 3 in | Not handed | Six #8 flat-head screws |
| 201081-1 | Butt hinge | Stamped 304 stainless steel | 3 × 3 in | Not handed | Six #8 flat-head screws |
| 201580-1 | Butt hinge | Stamped 304 stainless steel | 1⅜ × 1½ in | Not handed | Confirm original hole pattern |
| 201582-1 | Butt hinge | Stamped 304 stainless steel | 2 × 2 in | Not handed | Confirm original hole pattern |
| 201590-1 | Offset butt hinge | Stamped 304 stainless steel | 1½ × 1½ in | ⅜-in offset | Four #8 flat-head screws |
| 204279-1 | Right take-apart | Chrome-plated forged brass | 3⅞ × 2 in | Right-hand lift-off | Four #10 flat-head screws per hinge |
| 205310-1 | Short-side door hinge | Investment-cast 316 stainless steel | 2⅜ × 1½ in | Not specified | Five #10 flat-head screws |
Inspect the original hardware before replacing
Check whether the hinge leaves sit recessed or on the surface, measure the leaf footprint and offset, and note the opening direction. A right-handed take-apart fitting cannot be assumed to replace a left-handed hinge. Examine the screw holes and backing material for damage.
201590-1 uses stamped 304 stainless steel with a ⅜-inch offset. 204279-1 is a right-hand chrome-plated brass take-apart fitting. 205310-1 is a cast 316 stainless short-side hinge. These are not interchangeable simply because they are marine-grade hardware.
Before reusing an older hinge, check for seized pins, cracking around the mounting holes or excessive play.
Identify the Sea-Dog part by its MPN
Open the exact MPN for its listing and current availability.
Sea-Dog 201070-1
Butt hinge — 1¼ × 1½ in; Stamped 304 stainless steel. Not handed.
Check original part and availability
Sea-Dog 201080-1
Butt hinge — 2 × 3 in; Stamped 304 stainless steel. Not handed.
Check original part and availability
Sea-Dog 201081-1
Butt hinge — 3 × 3 in; Stamped 304 stainless steel. Not handed.
Check original part and availability
Sea-Dog 201580-1
Butt hinge — 1⅜ × 1½ in; Stamped 304 stainless steel. Not handed.
Check original part and availability
Sea-Dog 201582-1
Butt hinge — 2 × 2 in; Stamped 304 stainless steel. Not handed.
Check original part and availability
Sea-Dog 201590-1
Offset butt hinge — 1½ × 1½ in; Stamped 304 stainless steel. ⅜-in offset.
Check original part and availability
Sea-Dog 204279-1
Right take-apart — 3⅞ × 2 in; Chrome-plated forged brass. Right-hand lift-off.
Check original part and availability
Sea-Dog 205310-1
Short-side door hinge — 2⅜ × 1½ in; Investment-cast 316 stainless steel. Not specified.
Check original part and availabilityOther marine hardware identification
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