Sea-Dog 90 Degree Round Rail Base Fitting, 7/8 Inch Tube, 316 Stainless Steel, 280900-1

The Sea-Dog 280900-1 is a 90 degree round base fitting built for 7/8 inch diameter rail tubing on boats and other marine applications. It is used to change the direction of a round rail run by 90 degrees while keeping a low-profile, finished look at the joint. The fitting is constructed of investment cast 316 stainless steel, giving it strong resistance to corrosion in saltwater and marine environments over long-term outdoor exposure.

The fitting has a round base measuring 2-5/8 inch across and mounts to a deck or structure using three #10 flat head fasteners, which are not included. Where applicable, the fitting includes set screws that secure the tubing in place; these set screws require a 1/8 inch Allen wrench to install, and replacement set screws are available separately if needed. The fitting is designed for stainless tubing with a 0.049 inch wall thickness. This part is sold as a single unit and is intended for use with 7/8 inch round rail systems on boats, docks, and similar structures.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 280900-1
• Type: 90 Degree Round Rail Base Fitting
• Tube Outer Diameter: 7/8 inch
• Base Diameter: 2-5/8 inch
• Fastener Size: #10 Flat Head
• Material: 316 Stainless Steel
• Construction: Investment Cast
• Weight: 0.418 pounds
• Item Dimensions: 7.88 x 3.88 x 2.13 inches
• Installation Tool Required: 1/8 inch Allen wrench
• Fasteners Required: Three flat head fasteners (not included)
• Stainless Tube Wall Thickness: 0.049 inch

Fitment

Fits 7/8 inch outer diameter round rail tubing.

Replaces (OEM)

No OEM cross-reference numbers apply to this part.

Frequently Asked Questions

What tube diameter is the Sea-Dog 280900-1 rail base fitting made for? The Sea-Dog 280900-1 is made for 7/8 inch outer diameter round rail tubing.

Is this a straight fitting or an angled fitting? The 280900-1 is a 90 degree fitting, used to turn a round rail run at a right angle.

What material is the 280900-1 rail base fitting made from? It is made of investment cast 316 stainless steel, chosen for its corrosion resistance in marine environments.

How does the fitting attach to the deck or structure? The base of the 280900-1 mounts using three #10 flat head fasteners, which are not included with the fitting.

Does the 280900-1 include set screws for the tubing? Yes, this round base fitting includes set screws where appropriate to secure the tubing; replacement set screws are sold separately as part number 299999-1.

What tool is needed to install the set screws on this fitting? A 1/8 inch Allen wrench is required to install the set screws on the Sea-Dog 280900-1.

How much does the 280900-1 weigh? The Sea-Dog 280900-1 90 degree round base fitting weighs 0.418 pounds.

What wall thickness of stainless tubing is this fitting designed for? The 280900-1 is designed for stainless tubing with a wall thickness of 0.049 inch.

Is this fitting for round rail or rectangular rail? This is a round base fitting, intended for round rail tubing rather than rectangular rail.

What are the overall dimensions of the 280900-1 fitting? The fitting measures 7.88 x 3.88 x 2.13 inches.

Will the 280900-1 fit 1 inch rail tubing? No, the 280900-1 is sized for 7/8 inch tubing; the equivalent 90 degree round base fitting for 1 inch tubing is a separate part, 280901-1.

Is the 280900-1 suitable for saltwater use? Yes, because it is investment cast from 316 stainless steel, the 280900-1 resists corrosion in saltwater and other marine environments.