The Sea-Dog 281900-1 90° Rectangular Rail Base is a premium marine-grade fitting designed for securely mounting 7/8-inch outside diameter stainless steel tubing on boats and marine structures. Manufactured from investment-cast 316 stainless steel, it provides exceptional corrosion resistance and long-lasting performance in both saltwater and freshwater environments.

Ideal for handrails, bow rails, stern rails, bimini frames, and custom marine fabrication, this rectangular base fitting delivers a clean, professional installation while ensuring dependable structural support. The fitting is designed for tubing with a 0.049" wall thickness and installs using four #10 flat-head fasteners (not included). Set screws require a 1/8" Allen wrench and are sold separately.

Features

• Fits 7/8" (22 mm) outside diameter stainless steel tubing

• 90° rectangular base design

• Investment-cast 316 stainless steel

• Superior corrosion resistance for marine environments

• Polished finish

• Suitable for saltwater and freshwater applications

• Ideal for railings, handrails, bow rails, stern rails, and bimini tops

• Manufactured by Sea-Dog®

Specifications

• Brand: Sea-Dog

• Manufacturer Part Number: 281900-1

• UPC: 035514281072

• Material: Investment Cast 316 Stainless Steel

• Tube O.D.: 7/8" (22 mm)

• Angle: 90°

• Base Size: 1-11/16" × 3"

• Fastener: Four #10 Flat Head Screws (not included)

• Tube Wall Thickness: 0.049"

• Application: Boat railings, handrails, bimini frames, and custom marine installations

Weight

• Product Weight: 0.42 lb (6.7 oz / 190 g)