{"product_id":"8-pcs-304-stainless-steel-square-u-bolt","title":"Hotop 8 Pcs 304 Stainless Steel Square U-Bolt, 1\/2 D x 3 1\/16 W x 5 5\/16 Inch, Corrosion-Resistant Kit with Nuts \u0026 Washers","description":"\u003cstrong\u003eHotop 8-piece 304 stainless steel square U-bolt kit secures 3 x 3 in square beams and shafts with corrosion-resistant hardware for boat trailers, plumbing, and industrial frames.\u003c\/strong\u003e\n\n\u003cp\u003eThis complete set contains eight square U-bolts plus matching stainless flat washers, lock washers, and nylon-lock nuts so you get everything required to fasten rectangular tubing and wooden beams. Machined from 304 stainless steel, the components resist rust and hold steady in marine and humid environments. The bolts are sized to fit 3 x 3 inch sections and include 2-1\/2 inches of thread for flexible clamp thickness.\u003c\/p\u003e\n\n\u003ch3\u003eWhat sizes and parts are included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe pack includes 8 square U-bolts sized 1\/2 D x 3 1\/16 W x 5 5\/16 L, each with 2-1\/2 inches of thread. Also included are 16 stainless flat washers, 16 stainless nylon-lock nuts, and 16 lock washers—matching quantities allow secure fastening on both ends where needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eU-bolt dimension: 1\/2\" diameter, 3 1\/16\" inside width, 5 5\/16\" overall length\u003c\/li\u003e\n  \u003cli\u003eThread length: 2-1\/2\" for varied clamp thicknesses\u003c\/li\u003e\n  \u003cli\u003eHardware: 16 flat washers, 16 lock washers, 16 nylon-lock nuts\u003c\/li\u003e\n  \u003cli\u003eQuantity: 8 complete U-bolt assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable are these U-bolts in outdoor or marine use?\u003c\/h3\u003e\n\u003cp\u003eMade from 304 stainless steel, these U-bolts stand up to moisture, salt spray, and most common corrosive environments. While no metal is invulnerable, 304 stainless offers excellent general-purpose corrosion resistance for trailers, docks, and outdoor equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e304 stainless construction reduces rust and pitting\u003c\/li\u003e\n  \u003cli\u003eNylon-lock nuts help prevent loosening under vibration\u003c\/li\u003e\n  \u003cli\u003eSuitable for rainy, humid, and seaside conditions\u003c\/li\u003e\n  \u003cli\u003eEach bolt rated for typical clamp loads in general fastening tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I select and install the right square U-bolt for my project?\u003c\/h3\u003e\n\u003cp\u003eChoose the U-bolt when the tube or beam measures roughly 3 x 3 inches inside the U shape. Mark and drill matching holes into the parts to be clamped, place the U-bolt around the beam, then secure with washers and nylon-lock nuts using a hand wrench or socket—avoid impact drivers to protect threads and the nylon insert.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify beam\/tube dimensions before ordering\u003c\/li\u003e\n  \u003cli\u003eDrill clearance holes aligned with U-bolt legs\u003c\/li\u003e\n  \u003cli\u003eTighten nuts using a hand wrench or socket ratchet\u003c\/li\u003e\n  \u003cli\u003eDo not use high-speed impact tools on nylon-lock nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere are these square U-bolts typically used?\u003c\/h3\u003e\n\u003cp\u003eThey are commonly used to fasten or secure square and rectangular timber or metal members in vehicle trailers, marine trailers, plumbing runs, and industrial frames. The square profile keeps the bolt stable against flat surfaces and resists rotation in the clamp.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBoat and sailboat trailer mounting brackets\u003c\/li\u003e\n  \u003cli\u003eSecuring square tubing in rack and frame assemblies\u003c\/li\u003e\n  \u003cli\u003ePlumbing and conduit supports on rectangular runs\u003c\/li\u003e\n  \u003cli\u003eGeneral-purpose fastening for outdoor hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Hotop kit is aimed at DIYers, repair shops, trailer owners, and small fabricators who need a ready assortment of high-quality square U-bolts and matching hardware. If you work on boat trailers, outdoor racks, or any project with 3 x 3 inch square members and want corrosion-resistant fasteners with reliable locking nuts, this set supplies the fasteners and extras to complete multiple installations.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these U-bolts fit 3 x 3 inch square tubing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The inside width is 3 1\/16 inches, designed to fit standard 3 x 3 inch square tubing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use an impact driver to tighten the nuts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Use a hand wrench or socket ratchet to protect the nylon insert and threads from damage.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Hotop","offers":[{"title":"Default Title","offer_id":48027799257249,"sku":"B0C5RM7FK1","price":132.91,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/hotop-square-u-bolt-front-view.jpg?v=1791378236","url":"https:\/\/canadiansporting.ca\/products\/8-pcs-304-stainless-steel-square-u-bolt","provider":"Canadian Sporting","version":"1.0","type":"link"}