{"product_id":"bulldog-580402-dogbone-coupler-lock-5-8-in-stainless","title":"Bulldog 580402 Dogbone Coupler Lock 5\/8 In Stainless","description":"\u003cp class=\"nvn-hero\"\u003eThe Bulldog 580402 is a stainless steel dogbone coupler lock with a 5\/8 inch keyed pin and a dust cap. It fits couplers rated for Class III and IV hitches, blocking the latch so nobody lifts your trailer off the ball or drops it onto theirs. Cheap insurance at the ramp or in storage.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf you tow a boat, you already know the coupler is the weak point. Back down the ramp, drop the boat in, and your empty trailer sits in the lot with nothing stopping someone from lifting the coupler onto their own ball and driving off. That's exactly what the Bulldog 580402 is built to stop.\u003c\/p\u003e\n\u003cp\u003eThis is a dogbone-style coupler lock made from stainless steel, with a 5\/8 inch diameter pin and a keyed cylinder. It fits couplers rated for Class III and IV hitches, which covers most boat, utility, and equipment trailers. Slip it through the coupler, turn the key, and the latch can't be opened and the coupler can't be dropped onto a ball. Simple, and it works.\u003c\/p\u003e\n\u003cp\u003eStainless steel matters more than folks think. A trailer lock lives outside. It rides through rain, road salt in the winter, and saltwater spray every time you launch. A plated lock rusts, the keyway seizes, and one day you're standing at the ramp with a key that won't turn. Stainless holds up to all of that. The included dust cap covers the keyway when the lock isn't in use, so grit and salt stay out of the cylinder.\u003c\/p\u003e\n\u003cp\u003eWe like this one for the boat that lives on the trailer year-round, parked in the driveway or a storage lot between trips. It's also cheap insurance at the ramp when you're out on the water for a few hours and the trailer is sitting unattended. Will it stop a determined thief with an angle grinder? No lock this size will. But it stops the grab-and-go theft that accounts for most stolen trailers, and that's the whole point.\u003c\/p\u003e\n\u003cp\u003eKeep the key on your boat keyring and you'll always have it when you need it. And because it's Bulldog, you're getting gear from a name that's been building couplers, jacks, and hitches for the towing trade for a long time.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e5\/8 inch diameter locking pin puts a solid, hard-to-cut bar across the coupler latch\u003c\/li\u003e\n  \u003cli\u003eStainless steel construction shrugs off rain, road salt, and saltwater spray at the ramp\u003c\/li\u003e\n  \u003cli\u003eKeyed cylinder lock, no combinations to forget\u003c\/li\u003e\n  \u003cli\u003eIncluded dust cap keeps grit and salt out of the keyway between trips\u003c\/li\u003e\n  \u003cli\u003eFits couplers rated for Class III and IV hitches, covering most boat and utility trailers\u003c\/li\u003e\n  \u003cli\u003eDogbone design blocks the latch so the coupler can't be lifted off or dropped onto a ball\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Bulldog reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size is the locking pin?\u003c\/summary\u003e\n    \u003cp\u003eIt's a 5\/8 inch diameter pin, which is the standard size that fits the latch opening on most Class III and IV trailer couplers.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat hitches does this lock fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's designed for couplers rated for Class III and IV hitches. That covers the vast majority of boat, utility, and equipment trailers.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it actually stainless steel?\u003c\/summary\u003e\n    \u003cp\u003eYes. The whole lock is stainless steel, so it resists the rust and corrosion that seize up plated locks after a season of rain and saltwater.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with a dust cap?\u003c\/summary\u003e\n    \u003cp\u003eIt does. The dust cap covers the keyway when the lock isn't in use, keeping road grit and salt out of the cylinder so the key still turns when you need it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow does it keep my trailer from being stolen?\u003c\/summary\u003e\n    \u003cp\u003eThe keyed lock blocks the coupler latch, so a thief can't open the coupler to lift it off your ball or drop it onto theirs. It stops the quick grab-and-go theft that most trailers fall to.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I leave it on the trailer in the weather?\u003c\/summary\u003e\n    \u003cp\u003eYes. Between the stainless steel body and the dust cap over the keyway, it's built to live outside through rain, snow, and salt.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eBulldog 580402 Stainless Steel Dogbone Coupler Lock\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBulldog\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e580402\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e783192025807\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHitch Compatibility\u003c\/th\u003e\n\u003ctd\u003eClass III \/ IV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLock Style\u003c\/th\u003e\n\u003ctd\u003eDogbone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePin Diameter\u003c\/th\u003e\n\u003ctd\u003e5\/8 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLock Type\u003c\/th\u003e\n\u003ctd\u003eKeyed\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDust Cap\u003c\/th\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size is the locking pin?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a 5\/8 inch diameter pin, which is the standard size that fits the latch opening on most Class III and IV trailer couplers.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What hitches does this lock fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's designed for couplers rated for Class III and IV hitches. That covers the vast majority of boat, utility, and equipment trailers.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it actually stainless steel?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The whole lock is stainless steel, so it resists the rust and corrosion that seize up plated locks after a season of rain and saltwater.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with a dust cap?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It does. The dust cap covers the keyway when the lock isn't in use, keeping road grit and salt out of the cylinder so the key still turns when you need it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How does it keep my trailer from being stolen?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The keyed lock blocks the coupler latch, so a thief can't open the coupler to lift it off your ball or drop it onto theirs. It stops the quick grab-and-go theft that most trailers fall to.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I leave it on the trailer in the weather?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Between the stainless steel body and the dust cap over the keyway, it's built to live outside through rain, snow, and salt.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Bulldog","offers":[{"title":"Default Title","offer_id":45077421195357,"sku":"2009798","price":26.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_3f99f61a-19a0-489a-9052-204b2d7f1293.jpg?v=1789912589","url":"https:\/\/nvnmarine.com\/products\/bulldog-580402-dogbone-coupler-lock-5-8-in-stainless","provider":"NVN Marine","version":"1.0","type":"link"}