Identify Sea-Dog Bimini Top Caps & Inserts by Tube Size
When a boat's Bimini frame has a loose or broken end fitting, first identify whether it uses a cap over the tube or an insert inside it. Sea-Dog's stainless-steel and nylon top fittings differ in tube size and material even though these particular models share a 1/4-inch pivot pin.
Choose the matching design
Stainless caps for round frame tubing
Sea-Dog 270100-1 is a 316 stainless top cap for 7/8-inch round tubing. The similar-looking 270101-1 fits 1-inch tube. Both are specified for 1/4-inch pivot pins.
Nylon caps versus an internal insert
273100-1 and 273101-1 are black and white nylon top caps for 7/8-inch tube. The black 273180-1 is an insert rather than an outside cap; compare its mounting method with the original.
Compare manufacturer part numbers
| Sea-Dog MPN | Connection type | Tube size | Material | Pivot pin |
|---|---|---|---|---|
| 270100-1 | Outer top cap | 7/8 in tube OD | 316 stainless | 1/4 in pin |
| 270101-1 | Outer top cap | 1 in tube OD | 316 stainless | 1/4 in pin |
| 273100-1 | Outer top cap | 7/8 in tube OD | Black nylon | 1/4 in pin |
| 273101-1 | Outer top cap | 7/8 in tube OD | White nylon | 1/4 in pin |
| 273180-1 | Internal top insert | 7/8 in tube OD | Black nylon | 1/4 in pin |
The tube outside diameter, cap-versus-insert design and pin diameter are separate fit measurements. Stainless caps and nylon inserts cannot be assumed interchangeable.
How to check the original part
- Measure the round Bimini tube's outside diameter before choosing 7/8-inch or 1-inch fittings.
- Identify whether the existing part caps the outside of the tube or inserts into the end.
- Compare the original pin hole, pivot alignment and securing screws.
- Inspect the tubing for ovality, cracks and corrosion that might prevent the replacement seating.
- Review the individual listing for condition, quantity and included hardware; used parts can be viewed or picked up by appointment in Kelowna.
Identify the exact Sea-Dog part
Check the individual listing for its condition, photographs and included parts.
Related parts reference
Continue with Sea-Dog Bimini deck hinges and mounting bases when the associated component also needs attention.
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