{"product_id":"attwood-66548-3-stainless-steel-straight-thru-hull-fitting-barbed-1-inch-hose-standard-length","title":"Attwood 66548-3 Stainless Steel Barbed Straight Thru-Hull Fitting, 1-Inch Hose, Standard Length","description":"\u003cp\u003eThe Attwood 66548-3 is a stainless steel straight thru-hull fitting built to install securely through a boat's hull and deliver long-term, corrosion-free performance in the marine environment. It is a barbed, standard-length fitting designed for use with 1-inch inside diameter hose, making it a common choice for below-deck plumbing runs such as bilge, washdown, or raw water intake lines that need a reliable hull penetration point.\u003c\/p\u003e\u003cp\u003eThe fitting features a 2-1\/4 inch flange diameter that seats against the hull for a solid seal, a 1-3\/8 inch thread outside diameter with 2-1\/4 inch of thread length, and a 1-inch NPSM thread. The barb itself measures 1-1\/4 inch long, and the fitting's total length is 3-7\/8 inches. It requires a 1-1\/2 inch installation hole and is rated for hulls up to 1-3\/4 inch thick. Constructed of stainless steel, it resists the corrosion that can affect lower-grade metal fittings over time.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Attwood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 66548-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Size:\u003c\/strong\u003e 1 inch I.D.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e NPSM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Outside Diameter:\u003c\/strong\u003e 1-3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length:\u003c\/strong\u003e 2-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Diameter:\u003c\/strong\u003e 2-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarb Length:\u003c\/strong\u003e 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Length:\u003c\/strong\u003e 3-7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Hole Size:\u003c\/strong\u003e 1-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Hull Thickness:\u003c\/strong\u003e 1-3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8833 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size hose fits the Attwood 66548-3 thru-hull fitting?\u003c\/strong\u003e This thru-hull fitting is barbed for 1-inch inside diameter hose, and the 66548-3 designation refers to this specific hose size and length combination.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 66548-3 a barbed or threaded thru-hull fitting?\u003c\/strong\u003e It is a barbed fitting, meaning the hose pushes directly onto the barb rather than connecting to a threaded pipe fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Attwood 66548-3 thru-hull made from?\u003c\/strong\u003e Stainless steel, chosen for corrosion resistance in below-deck marine plumbing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size hole do I need to drill to install this fitting?\u003c\/strong\u003e A 1-1\/2 inch installation hole is required to mount the Attwood 66548-3 thru-hull fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum hull thickness this fitting will work with?\u003c\/strong\u003e The 66548-3 accommodates hulls up to 1-3\/4 inch thick, based on its 2-1\/4 inch thread length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the Attwood 66548-3 overall?\u003c\/strong\u003e 3-7\/8 inches from end to end, with a 1-1\/4 inch barb and 2-1\/4 inch of NPSM thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the flange diameter on this thru-hull fitting?\u003c\/strong\u003e 2-1\/4 inches, which is the diameter of the flange that seats against the hull surface for the 66548-3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread type does the Attwood 66548-3 use?\u003c\/strong\u003e A 1-inch NPSM thread with a 1-3\/8 inch thread outside diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this thru-hull fitting weigh?\u003c\/strong\u003e The Attwood 66548-3 weighs 0.8833 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Attwood part or an aftermarket copy?\u003c\/strong\u003e The 66548-3 is a genuine Attwood-manufactured stainless steel thru-hull fitting, not a generic aftermarket substitute.\u003c\/p\u003e","brand":"Attwood","offers":[{"title":"Default Title","offer_id":48989673095387,"sku":"ATT-66548-3","price":33.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/7193Qna-FBL.jpg?v=1784487022","url":"https:\/\/www.goodvibesmarina.com\/products\/attwood-66548-3-stainless-steel-straight-thru-hull-fitting-barbed-1-inch-hose-standard-length","provider":"Good Vibes Marina","version":"1.0","type":"link"}