{"product_id":"curt-trailer-tongue-coupler-lock-black-1-4-pin-fits-up-to-3-4-span-steel-padlock-style-security","title":"CURT Trailer Tongue Coupler Lock – Black 1\/4\" Pin, Fits Up to 3\/4\" Span, Steel Padlock-Style Security","description":"\u003cp\u003e\u003cstrong\u003eCURT 23521 is a padlock-style trailer tongue coupler lock that secures latch-type couplers with a 1\/4-inch pin and up to a 3\/4-inch span to deter theft while hitched.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you tow a boat, camper, or utility trailer, a simple safety pin may not be enough to prevent tampering. The CURT 23521 couples a robust steel construction with a padlock design that locks the coupler latch into place, offering a stronger deterrent than non-locking pins. Finished in black with a zinc-plated pin, this compact lock is made to fit most latch-type trailer couplers and arrives with two keys for convenient access.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this lock improve trailer security when connected?\u003c\/h3\u003e\n\u003cp\u003eThe CURT coupler lock goes beyond retaining the latch by locking it, which reduces the chance of unauthorized uncoupling. Its padlock-style housing shields the locking pin from easy tampering and the heavy-duty appearance alone discourages opportunistic theft.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction resists cutting and bending.\u003c\/li\u003e\n  \u003cli\u003ePadlock-style body covers the pin to limit pry access.\u003c\/li\u003e\n  \u003cli\u003eDurable finish and plating protect moving parts.\u003c\/li\u003e\n  \u003cli\u003eTwo keys included to avoid lockouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my trailer’s coupler and how easy is it to use?\u003c\/h3\u003e\n\u003cp\u003eThis model is designed for latch-type couplers with a maximum span of 3\/4 inch and accepts a 1\/4-inch diameter pin. Operation is straightforward: slide the pin through the latch area and turn the key to lock or unlock, making it a quick addition to your hitch routine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits latch-type couplers up to 3\/4\" span.\u003c\/li\u003e\n  \u003cli\u003e1\/4\" pin diameter for standard latch holes.\u003c\/li\u003e\n  \u003cli\u003eSimple 1\/4-turn lock action for fast use.\u003c\/li\u003e\n  \u003cli\u003eTwo keys let you keep a spare for emergencies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this lock hold up outdoors and over time?\u003c\/h3\u003e\n\u003cp\u003eThe CURT 23521 is finished in black paint to resist weathering, while the pin is zinc-plated to slow corrosion where metal contacts metal. Regular inspection and basic maintenance, such as occasional lubrication of the keyway, will extend its reliable service in outdoor conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBlack painted body for exterior protection.\u003c\/li\u003e\n  \u003cli\u003eZinc-plated pin reduces rust at contact points.\u003c\/li\u003e\n  \u003cli\u003eSolid steel core to withstand regular use.\u003c\/li\u003e\n  \u003cli\u003eSimple design minimizes parts that can fail outdoors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about keys, replacement, and compatibility?\u003c\/h3\u003e\n\u003cp\u003eThe lock ships with two keys so you can store a spare in a safe place or share one with a trusted person. If you lose keys, replacement or rekeying is possible through CURT or a locksmith familiar with trailer hardware; confirm model details when requesting service.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes two keys for convenience and backup.\u003c\/li\u003e\n  \u003cli\u003eReplacement keys or rekey service available via manufacturer or locksmith.\u003c\/li\u003e\n  \u003cli\u003eKeep model number (CURT 23521) handy for compatibility checks.\u003c\/li\u003e\n  \u003cli\u003eNot intended for non-latch coupler types—measure span and pin hole first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The CURT 23521 coupler lock is suited for trailer owners who want a compact, easy-to-use lock that secures latch-style couplers while the trailer is hitched. It’s a practical choice for recreational boaters, RV owners, landscapers, or anyone who needs quick, visible theft deterrence and simple operation without bulky hardware.\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: What coupler sizes does the CURT 23521 fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits latch-type couplers with a maximum 3\/4-inch span and uses a 1\/4-inch diameter pin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the lock come with keys and can I get replacements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, two keys are included; replacement keys or rekey services are available from CURT or a qualified locksmith.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CURT","offers":[{"title":"Default Title","offer_id":55162893697367,"sku":"B00T9N6H06","price":30.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/curt-23521-front-view.jpg?v=1790339588","url":"https:\/\/britishgarage.co.uk\/products\/curt-trailer-tongue-coupler-lock-black-1-4-pin-fits-up-to-3-4-span-steel-padlock-style-security","provider":"British Garage","version":"1.0","type":"link"}