Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter delivers rugged reliability for your boat with a precision-fit thru-hull fitting crafted from corrosion-resistant stainless steel.

Polished to a mirror finish and passivated for extra protection, these fittings stand up to the toughest marine conditions. Cast from certified Enhanced 316 stainless steel, they offer strength, lifetime corrosion resistance, and a clean, professional look.

Designed for speed and ease of installation on your hull:

• Thick steel sidewalls withstand continual stress and hose flexing
• New silicone gasket on each thru-hull for easier, leak-free sealing
• A channel under the flange holds a bead of sealant for a trouble-free seal
• Wrench flats or an end notch provide a gripping surface, so one installer can tighten all connections from inside the hull
• Barbed tail ends provide room to fit multiple clamps
• Standard thread model with full-length thread for thick hulls and easy tightening

Specifications

• Hose size: 1-1/2" inner diameter
• Flange Diameter: 3"
• Thread O.D.: 1-7/8"
• Thread Length: 2-1/2"
• Barb Length: 1-1/4"
• Total Length: 4-1/8"
• Install Hole Saw Size: 2"
• Thread NPSM: 1-1/2"
• Max Hull Thickness: 1-7/8"
• Note: Installations above the water line only
• Manufacturer: Attwood Marine
• Manufacturer Part No: 66551-3
• UPC: 022697665515

Choose Attwood for a thru-hull that combines performance, durability, and a worry-free seal—backed by a trusted marine manufacturer and designed to last the life of your boat.