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The most common ones for hitch receiver sizes are 1-1/4 inches, 2 inches, 2-1/2 inches, and 3 inches.
For the pin diameter, common sizes are 1/2 inch and 5/8 inch.
In addition, trailer locks often fit couplers with sizes of 1-7/8 inches, 2 inches, and 2-5/16 inches.
A trailer hitch pin lock is a critical security accessory for anyone who tows trailers. It prevents unauthorized removal of your trailer from the hitch, protecting valuable cargo like boats, ATVs, or utility trailers. Without it, theft risks rise significantly, especially in public parking lots or job sites. Made from durable materials like stainless steel or hardened steel, these locks resist picking, cutting, and corrosion, ensuring long-lasting protection for your towing investments.
Trailer hitch pin locks come in various standard sizes to fit common hitch classes (1 to 5), with pin diameters ranging from 1/2 inch to 5/8 inch. This ensures compatibility with most trucks, SUVs, and trailers. For unique or non-standard hitches, custom options are available. You can customize lock length, key type (keyed alike or unique), or even add engraved logos for branding. Custom locks provide a perfect fit, eliminating gaps that could compromise security or functionality.
Lock Type | Key Features | Ideal Use Case |
|---|---|---|
Standard Pin Lock | Basic design, easy to install, key-operated | Everyday towing (campers, utility trailers) |
Swivel Head Lock | 360° swivel, fits tight spaces, weather-resistant | Trucks with limited hitch access |
Combo Lock | Keyless, numeric code, no key loss risk | Multi-user environments (fleets, businesses) |
Heavy-Duty Lock | Thick steel, anti-drill plates, high-security core | High-value trailers (boats, construction equipment) |
Using a trailer hitch pin lock is simple: insert the pin through the hitch and trailer coupler, attach the lock body, and secure it with a key or combo. Maintenance is minimal—clean the lock regularly with a damp cloth to remove dirt, and apply a light lubricant (like silicone spray) to the keyway annually to prevent jamming. Avoid harsh chemicals, as they can damage the lock’s finish or internal components.
When selecting a lock, first check your hitch’s pin diameter and class to ensure a proper fit. Prioritize materials—stainless steel works best for wet climates to resist rust. Consider security level: if towing high-value items, opt for a heavy-duty lock with anti-theft features. Also, think about convenience: combo locks are great for those who hate losing keys, while keyed-alike locks suit multiple trailers.
Q: Will a trailer hitch pin lock fit any hitch?
A: No, choose a lock matching your hitch’s pin diameter and class. Standard sizes fit most, but custom options are for unique hitches.
Q: Can I use the same key for multiple locks?
A: Yes, many brands offer keyed-alike locks, ideal for those with multiple trailers or vehicles.
Q: Are combo locks as secure as keyed ones?
A: High-quality combo locks are secure, but keyed locks with high-security cores offer slightly better anti-picking protection.
Q: How weather-resistant are these locks?
Most are weather-resistant, with stainless steel or coated finishes. Avoid submerging them in water for long periods.
Q: What if I lose my lock key?
Contact the manufacturer with your lock’s model number—many offer replacement keys for a fee. Combo locks avoid this issue.
