Product details
Toptow 63517 dogbone trailer hitch lock – 5/8in pin, black
Quick overview
Think of this as a straightforward, no-nonsense locking pin that keeps your ball mount, bike rack or cargo carrier where it belongs — and makes life harder for opportunistic thieves. The TOPTOW 63517 uses a 5/8in hardened-steel pin, a tubular lock cylinder and a push-to-lock action, so you can secure your gear quickly without faffing about with fiddly keys every time.
Key features
- One-piece hardened-steel locking pin: 5/8in diameter with roughly 3.5in of usable span, so it fits most ball mounts and accessories that take a 5/8in pin.
- Push-to-lock plus 1/4-turn tubular cylinder — press and twist to lock; open with the tubular keys. Supplied with two keyed-alike keys, handy if you misplace one.
- Electrocoat (e‑coat) finish and a rubber key-cap help keep rain, salt and grime out of the mechanism — a proper bonus if you tow in winter or by the coast.
- Double-shear strength rated at 10,000 kg (10 tonne) for greater resistance to levering and theft attempts.
- Works with Class III, IV and V hitches and heavier truck receivers with 2in and 2.5in openings — just check your ball-mount hole size before you buy.
Technical specifications
Model: 63517 – Exterior: black e‑coat – Pin diameter: 5/8in (hardened steel) – Usable active length: approx. 3.5in – Lock type: tubular zinc-alloy cylinder – Keys: 2 tubular keyed-alike – Package weight: 406 g – Package dimensions: 19.6 x 7.6 x 4.6 cm.
Installation and everyday use
Fitting is dead simple: line up the ball mount, push the dogbone pin through the receiver and the shank hole, then press to lock or give the head a quarter-turn to engage the cylinder. Always give the head a feel to make sure it’s seated before you tow. The rubber key-cap helps keep muck and water at bay, but it’s wise to wipe the lock down after salty or muddy runs to keep everything working smoothly.
Who this suits and what problems it solves
- Anyone using removable hitch accessories who wants to cut the risk of theft — handy for bike-rack users, caravan owners and tradespeople with cargo trays.
- Those who tow in wet or coastal conditions and need a lock that’s more resistant to corrosion and seizing up.
- People who prefer a quick, tool-free locking action for frequent hitching and unhitching — no faffing with clips or extra tools.
One common question is whether it’ll fit every setup — best to confirm your accessory uses a 5/8in pin hole and that the roughly 3.5in usable length is enough. If that checks out, it’s a robust, practical lock that takes a fair bit of worry out of towing.
What’s in the box
- 1 x 5/8in diameter lock pin (dogbone)
- 1 x lock head with tubular cylinder
- 1 x rubber key cap
- 2 x tubular round keys (keyed alike)