Stainless Steel Straight Thru-Hulls,Threaded


Regular price $ 37.58
Stainless Steel Straight Thru-Hulls,Threaded - BacktoBoating

Lifetime Warranty

Each Thru-Hull and Scupper Valve is available with a new silicone gasket and are backed by Attwood's trusted Lifetime Warranty! Why specify plastic parts when these fittings will last the life of the boat. They offer unique multi-thread design with NPSM and NPT threads with plenty of thread length that allows direct connection to seacocks or pipes.

 Rugged Stainless Construction

  • Cast from certified enhanced #316 Stainless Steel allow for strength and lifetime corrosion-resistance
  • We polish all visible areas to a mirror finish, then each part through a passivation for additional protection
  • Thick steel sidewalls withstand continual stress and hose flexing        

Solid Solicone Gasket

  • Gasket is dimensionally stable--will not deteriorate or shrink over time
  • Excellent resistance to UV & weather-aging
  • Watertight, fool-proof, one-piece seal
  • Eliminates the need to form and apply sealant or caulk

 Caution: Thru-Hull connectors are designed for installation above the water line only.

A Flange Dia. B Thread  O.D. C Total Length Installation HoleSaw Size   Threads NPSM Max Hull Thickness Bulk Without Gasket Bulk With Gasket
1-7/8" I.D. 2-1/8" 2-1/2" 1-1/8" 3/4" 1-5/8" 66559-1 66559G1  
2-1/4" I.D. 2-1/4" 2-5/8" 1-3/8" 1" 1-3/4" 66561-1 66561G1
3" I.D. 2-3/8" 2-3/4" 2" 1-1/2" 1-7/8" 66563-1 66563G1

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