Sea-Dog Rail Base Fitting 280301-1, 30 Degree Round Base, 1 inch Tube OD, 316 Stainless Steel

The Sea-Dog 280301-1 is a 30 degree round base rail fitting used to mount 1 inch outside diameter tubing at an angled offset on a boat rail system. It is investment cast from 316 stainless steel, giving it strong resistance to corrosion in marine environments while providing a durable, finished mounting point for rail sections, handrails, or other tube-based hardware.

The fitting has a round base with a 2-3/4 inch diameter and mounts using a 1/4 inch flat head fastener. It accepts stainless tubing with a wall thickness of 0.049 inch. Round rail base fittings in this Sea-Dog line include set screws where appropriate; a 1/8 inch Allen wrench is required to install and secure the set screw. Mounting fasteners (three flat head screws) are not included with the fitting and must be sourced separately, and replacement set screws are available separately under part number 299999-1.

This 30 degree round base fitting is part of a broader Sea-Dog rail base fitting line that also includes 45, 60, and 90 degree angles, as well as low-profile and rectangular base versions, in both 7/8 inch and 1 inch tube OD sizes, so buyers can match the fitting to their specific tube diameter and desired angle.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 280301-1
• Angle: 30 Degree
• Base Style: Round Base
• Base Diameter: 2-3/4 inch
• Tube Outside Diameter: 1 inch
• Tube Wall Thickness: 0.049 inch
• Fastener Size: 1/4 inch Flat Head
• Material: Investment Cast 316 Stainless Steel
• Weight: 0.466 pounds
• Installation Tool Required: 1/8 inch Allen wrench
• Standard Pack: 10 each

Frequently Asked Questions

What size tubing does the Sea-Dog 280301-1 rail base fitting accept? The 280301-1 is sized for 1 inch outside diameter tubing with a wall thickness of 0.049 inch.

What angle is this rail base fitting? The 280301-1 is a 30 degree round base fitting, used to set an angled offset in a rail run.

What material is the 280301-1 made from? It is investment cast from 316 stainless steel, chosen for its resistance to corrosion in marine environments.

Are mounting fasteners included with the 280301-1? No. The fitting installs with three flat head fasteners sized 1/4 inch, which are not included and must be purchased separately.

Does the 280301-1 come with a set screw? Sea-Dog round rail base fittings include set screws where appropriate; replacement set screws for this line are available separately as part number 299999-1.

What tool is needed to install the set screw on the 280301-1? A 1/8 inch Allen wrench is required to install the set screw on the 280301-1 rail base fitting.

What is the base diameter of the 280301-1? The round base of the 280301-1 measures 2-3/4 inches in diameter.

How much does the 280301-1 weigh? The Sea-Dog 280301-1 weighs 0.466 pounds.

What fastener size mounts the base to the deck or rail structure? The 280301-1 base fastener is a 1/4 inch flat head screw.

Is the 280301-1 suitable for saltwater use? Yes, it is constructed of corrosion resistant investment cast 316 stainless steel, a grade suited to saltwater exposure.

What is the difference between the 280301-1 and the 280300-1? Both are 30 degree round base fittings, but the 280300-1 is sized for 7/8 inch OD tubing with a #10 flat head fastener, while the 280301-1 is sized for 1 inch OD tubing with a 1/4 inch flat head fastener.

How are the 280301-1 fittings packaged? The 280301-1 rail base fitting is packed in a standard pack of 10 each.