{"product_id":"attwood-st33-20-5-stainless-steel-gas-spring-15-in-extended-9-5-in-compressed-20-lb-force-8mm-rod","title":"Attwood ST33-20-5 Stainless Steel Gas Spring, 15 Inch Extended, 20 LB Boat Hatch Lift Support","description":"\u003cp\u003eThe Attwood ST33-20-5 is a stainless steel gas spring built to hold boat hatches, deck lids, livewell covers, and line lockers open safely and smoothly. The pressure tube and rod are made from tough #316 stainless steel alloy, with all other exposed components finished in stainless steel or marine-grade composite, making this gas spring well suited to saltwater environments and other moisture-prone areas where corrosion resistance and long-term durability matter.\u003c\/p\u003e\u003cp\u003eThis unit is rated at 20 pounds of force with a 5.5 inch stroke, extending to 15 inches overall and compressing down to 9.5 inches. The 8mm rod pairs with a 10mm composite socket end for a secure, low-maintenance connection point. It ships as a single gas spring, ready to install as a direct replacement wherever a compatible stroke, force rating, and end-fitting size are required.\u003c\/p\u003e\u003cp\u003eCommon applications include deck hatches, storage lid supports, livewell lids, and line locker covers on boats where a reliable, corrosion-resistant lift assist is needed.\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 ST33-20-5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Gas Spring (Stainless Steel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless steel (#316 alloy) with marine-grade composite components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke Length:\u003c\/strong\u003e 5.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressed Length:\u003c\/strong\u003e 9.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Length:\u003c\/strong\u003e 15 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForce Rating:\u003c\/strong\u003e 20 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Diameter:\u003c\/strong\u003e 8 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSocket Type:\u003c\/strong\u003e 10 millimeters, composite\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Size:\u003c\/strong\u003e 5\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 2.12 x 0.75 x 22.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.552 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Attwood ST33-20-5 used for?\u003c\/strong\u003e The Attwood ST33-20-5 is a stainless steel gas spring used to hold boat hatches, deck lids, livewell covers, and line lockers open, providing controlled, assisted lift.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat force rating does this gas spring have?\u003c\/strong\u003e The ST33-20-5 is rated at 20 pounds of force, which determines how much weight it can support when holding a hatch or lid open.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the extended and compressed lengths of the ST33-20-5?\u003c\/strong\u003e This gas spring extends to 15 inches and compresses down to 9.5 inches, with a stroke length of 5.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the ST33-20-5 suitable for saltwater use?\u003c\/strong\u003e Yes, the pressure tube and rod are made from #316 stainless steel alloy, with all other exposed parts in stainless steel or marine-grade composite, making the ST33-20-5 well suited to saltwater and other moisture-prone marine environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the rod diameter on this gas spring?\u003c\/strong\u003e The Attwood ST33-20-5 has an 8mm rod diameter, paired with a 10mm composite socket end fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the ST33-20-5 gas spring weigh?\u003c\/strong\u003e This gas spring weighs 0.552 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the overall size of the ST33-20-5?\u003c\/strong\u003e The unit measures 2.12 x 0.75 x 22.5 inches in overall item dimensions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gas springs come in one package?\u003c\/strong\u003e One Attwood ST33-20-5 gas spring is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the end fittings made of on this gas spring?\u003c\/strong\u003e The ST33-20-5 uses a 10mm composite socket-type end fitting, while the main tube and rod are stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the ST33-20-5 gas spring typically installed?\u003c\/strong\u003e Common installation points include deck hatches, storage lid supports, livewell lids, and line locker covers on boats.\u003c\/p\u003e","brand":"Attwood","offers":[{"title":"Default Title","offer_id":48989678665947,"sku":"ATT-ST33-20-5","price":35.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/31wYQ6zDN8L.jpg?v=1784487334","url":"https:\/\/www.goodvibesmarina.com\/products\/attwood-st33-20-5-stainless-steel-gas-spring-15-in-extended-9-5-in-compressed-20-lb-force-8mm-rod","provider":"Good Vibes Marina","version":"1.0","type":"link"}