SKU: 25697720213

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" Inner Diameter

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Description

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" Inner DiameterStainless Steel Thru Hull Standard Straight Barbed 1 1 8" Inner Diameter Polish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat? Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion resistance All visible areas are polished to a mirror finish, then passivate each part for additional

Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" Inner Diameter

Polish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?

Rugged Stainless Construction:

  • Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance
  • All visible areas are polished to a mirror finish, then passivate each part for additional protection
  • Thick steel sidewalls withstand continual stress and hose flexing

Faster, Simpler Installation:

  • Each Thru-Hull is available with a new silicone gasket
  • A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal
  • All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull
  • The barbed tail ends provide plenty of room to hold multiple clamps

Stainless Steel Straight Thru-Hulls, Barbed

  • Standard Thread model has a full-length thread for thick hulls and easy tightening

Specifications:

  • Hose size: (inch) 1-1/8" inner diameter
  • Flange Diameter: (inch) 2-1/4"
  • Thread O.D. (outside diameter): (inch) 1-3/8" 
  • Thread Length: (inch) 2-3/8"
  • Barb Length: (inch) 1-1/4"
  • Total Length: (inch) 3-7/8"
  • Install Hole Saw Size: (inch) 1-1/4" 
  • Thread NPSM: (inch) 1"
  • Max Hull Thickness: (inch) 1-3/4"

*Stainless Steel Thru-Hull Connectors are designed for installation above the water line only


Manufacturer : Attwood Marine
Manufacturer Part No : 66549-3
UPC : 022697665492
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25697720213

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4.7 ★★★★★
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Fivestarr
Natrona Heights, US
★★★★★ 5
exact fit
working good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
J
Verified Purchase
Joe Cruz
Bozeman, US
★★★★★ 5
Fast delivery.
Great product. OEM spark plugs.
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Reviewed in the United States on January 5, 2026
A
Verified Purchase
Aspen Valdez
Whiting, US
★★★★★ 5
Fits 2011 335xi n55 prefect
Fits my 2011 335xi n55 engine perfectly. Comes on and off easily and gets the filter loose quickly. Amazing quality
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Reviewed in the United States on March 15, 2026
C
Verified Purchase
Clint
Battle Creek, US
★★★★★ 5
Works perfect for BMW S63 engine.
I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).
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Reviewed in the United States on September 8, 2025
C
Verified Purchase
Chad altenbach
Belleville, US
★★★★★ 5
Made well and great fit
Fits perfectly and is made well
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Reviewed in the United States on May 8, 2026

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