TowWorks 5/8" Keyed-Alike Trailer Hitch Lock — Extra-Long 4.5" Span for 3" Receivers, Anti-Rattle O-Rings

TowWorks 79830 is an extra-long 5/8" keyed-alike trailer hitch lock with a 4-1/2" active span designed to secure 3" receivers and most adjustable channel-style hitches.

This heavy-duty tow hitch locking pin combines a long stainless-steel shaft, a push-lock tubular key cylinder, and removable rubber O-rings to reduce rattle and improve fit. It ships with two identical keys and a separate spring (cotter) clip for redundancy. The design fits many adjustable CURT-style channels and pintle mounts — verify your hitch dimensions before ordering to ensure compatibility.

Will this hitch lock fit my adjustable receiver or pintle mount?

The TowWorks 79830 offers a 5/8" diameter pin with a maximum active length of 4-1/2", which matches many adjustable channel-style hitches and certain pintle hooks. It is built for 3" receiver applications but does not fit FASTWAY adjustable hitches. Always measure your hitch’s tube and hole spacing prior to purchase.

• Pin diameter: 5/8" (standard locking strength)
• Maximum active length: 4-1/2" for adjustable channels
• Compatible with CURT channel-type hitches (models 45900–45902) and specific pintles (45907, 45908)
• Not compatible with FASTWAY adjustable hitches

How does the locking mechanism and keys work?

This lock uses a push-lock tubular cylinder that secures with a 1/4-turn action, supplied with two keyed-alike tubular keys for easy operation. A watertight rubber dust cap helps protect the cylinder from corrosion and debris, keeping the mechanism operating smoothly in wet conditions.

• Push-lock, 1/4-turn tubular key cylinder
• Comes with two identical keys for convenience
• Rubber dust cap for water and debris protection
• Keyed-alike option across multiple units if ordered as specified

What anti-rattle and safety features are included?

Rubber O-rings on the pin reduce noise and hold the pin steady inside the receiver tube; you can add or remove rings to fine-tune fit for different brands. A separate spring (cotter) clip is included for backup security and must be used when relying on the mechanical lock for towing safety.

• Interchangeable rubber O-rings to minimize rattles
• Separate spring/cotter clip for redundant retention
• Option to use lock with or without the cotter clip as needed
• Adjust O-ring quantity for best fit across receivers

How do I order multiple locks keyed alike?

TowWorks 79830 items are sold keyed alike per listing. Choose the correct SKU for the number of keyed-alike locks you need: single listing items are keyed alike within that SKU. For orders requiring more than four keyed-alike locks, follow the product combination instructions to ensure all arrive with the same keying.

• Each 79830 unit ships keyed alike within that listing
• For two keyed-alike locks, select SKU 79832
• For three keyed-alike locks, select SKU 79833
• Combine SKU options for orders of four or more keyed-alike units

Who is this for: The TowWorks 79830 is aimed at trailer owners, commercial fleets, and anyone using adjustable channel-style hitches or compatible pintle mounts who needs a longer locking pin for secure towing. It’s particularly useful for users who want a keyed-alike setup across multiple trailers or hitch components, those who want to reduce receiver rattle, and buyers who value a weather-protected lock cylinder for long-term outdoor use.