Marine Plumbing & Ventilation - Thru-Hull Fittings

106 products


  • Sale -17% GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]

    GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]

    21 in stock

    Bronze Hose Barb Thru-Hull Fitting - 1/2" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.45 lbs UPC: 742985004900

    21 in stock

    $21.00$17.50

  • Sale -20% GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

    GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

    10 in stock

    1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread #316 Stainless Steel Sizes from 1/2" to 3" UL Listed 647B BSPP and Stainless Steel models available Specifications: Hose Size: 1/2" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 5"L WT: 0.45 lbs UPC: 742985158887

    10 in stock

    $22.00$17.50

  • Sale -43%Last stock! GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]

    GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]

    4 in stock

    2" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 2" Material: Bronze Box Dimensions: 4"H x 4"W x 6"L WT: 2.6 lbs UPC: 742985141780

    4 in stock

    $124.00$70.50

  • Last stock! Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]

    Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]

    5 in stock

    Plastic Thru-Hull Fitting - 1-1/2" - WhiteThese thru-hulls are made with a durable, thermoplastic construction which prevents electrolysis.Caution: Thru-Hull connectors are designed for installation above the water line only.Specifications: Fits Hose Size: 1-1/2" I.D. Stem Length: 3-1/2" Max. Hull Thickness: 1-1/4" Flange Diameter: 3" Installation Hose Size: 1-7/8" to 2" Construction: Polypropylene WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Specifications: Hose Size: 1-1/2" Material: Plastic Box Dimensions: 4"H x 6"W x 9"L WT: 0.2 lbs UPC: 022697387530

    5 in stock

    $14.50

  • Sale -60%Last stock! Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]

    Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]

    4 in stock

    Perko 2" Thru-Hull Fitting w/ Pipe Thread BronzeFlange is machined to fit hull and grooved to retain bedding compound. Neck is threaded to approximately 3/8 inch from flange.Cast Bronze.Technical Information: Pipe Size Inches: 2 Mounting Hole Diameter Inches: 2-3/8 Maximum Hull Thickness Inches: 2-3/8 O.D. Flange Inches: 3-5/8 Model Number: 0322009PLB Ship Weight: 2.1/19.4 lbs. MADE IN THE USA Specifications: Hose Size: 2" Material: Bronze Box Dimensions: 4"H x 5"W x 5"L WT: 2.05 lbs UPC: 085226112058

    4 in stock

    $209.01$84.50

  • Sale -40%Last stock! Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]

    Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]

    4 in stock

    Perko 5" X 3-1/4" Scoop Strainer BronzeCast bronzeMachine slotsTechnical Information: For Thru-Hull Size Inches: 3/4 & 1 Dimensions Strainer Inches: 5 X 3-1/4 Model Number: 0066DP2PLB Ship Weight: 4.4/4.3 lbs. Screw Size: #8 Specifications: Material: Bronze Box Dimensions: 1"H x 3"W x 5"L WT: 0.85 lbs UPC: 085226337390

    4 in stock

    $62.16$37.50

  • Sale -6% Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

    9 in stock

    Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner DiameterPolish 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, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 3/4" inner diameter Flange Diameter: (inch) 1-7/8" Thread O.D. (outside diameter): (inch) 1"  Thread Length: (inch) 2" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-3/4" Install Hole Saw Size: (inch) 1-1/8"  Thread NPSM: (inch) 3/4" Max Hull Thickness: (inch) 1-5/8" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 3/4" Material: Stainless Steel Box Dimensions: 2"H x 3"W x 6"L WT: 0.6 lbs UPC: 022697665478 Quick Guide (pdf)

    9 in stock

    $30.39$28.50

  • Sale -20% GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]

    GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]

    19 in stock

    3/4" Bronze High Speed Thru-Hull Fitting w/Nut Features: Designed for increased flow compared to standard Thru Hulls and with less drag NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 3/4" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.45 lbs UPC: 742985141728

    19 in stock

    $22.00$17.50

  • Sale -16% Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

    Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

    6 in stock

    Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner DiameterPolish 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, BarbedShort Thread is a more compact size, which allows installation near corners and in confined areasSpecifications: Hose size: (inch) 1" inner diameter Flange Diameter: (inch) 2-1/4" Thread O.D. (outside diameter): (inch) 1-3/8"  Thread Length: (inch) 1-1/8" Barb Length: (inch) 1" Total Length: (inch) 2-1/2" Install Hole Saw Size: (inch) 1-1/2"  Thread NPSM: (inch) 1" Max Hull Thickness: (inch) 5/8" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 1" Material: Stainless Steel Box Dimensions: 2"H x 3"W x 3"L WT: 0.6 lbs UPC: 022697665423 Quick Guide (pdf)

    6 in stock

    $35.16$29.50

  • Sale -27%Last stock! GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]

    GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]

    3 in stock

    1/2" Bronze Combo Scoop Thru-Hull w/NutFeatures: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C83600 Bronze Specifications:Thread NPS: 1/2" Specifications: Hose Size: 1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.8 lbs UPC: 742985063884

    3 in stock

    $35.00$25.50

  • Sale -44%Last stock! Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

    Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

    5 in stock

    Perko 1" Thru-Hull Connection f/ use with Hose BronzeFlange is machined to fit and grooved to retain bedding compound neck isthreaded to approximately 3/16 inch from flange. Cast bronze, plain or chromed brass Regular or short length versions Regular Length- Fits maximum hull thickness up to 2 inchesShort Length- For thin hull sections up to 5/8 inches maximumTechnical Information Regular Length - Plain Bronze: Hose Size Inches: 1 Mounting Hole Diameter Inches: 1-5/16" Maximum Hull Thickness Inches: 1-3/4" O.D. Flange Inches: 2-1/4" Model Number: 0350006DPP Ship Weight: 4.7/8.6 lbs. Made in the USA Specifications: Hose Size: 1" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.85 lbs UPC: 085226036101

    5 in stock

    $88.08$49.50

  • Sale -17% Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]

    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]

    12 in stock

    Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner DiameterPolish 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, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 1" inner diameter Flange Diameter: (inch) 2-1/4" Thread O.D. (outside diameter): (inch) 1-3/8"  Thread Length: (inch) 2-1/4" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-7/8" Install Hole Saw Size: (inch) 1-1/2"  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 Specifications: Hose Size: 1" Material: Stainless Steel Box Dimensions: 3"H x 4"W x 7"L WT: 0.8 lbs UPC: 022697665485 Quick Guide (pdf)

    12 in stock

    $35.42$29.50

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