TowWorks 79831 Keyed Unique 5/8-Inch Trailer Hitch Lock with Extra Long 4-1/2-Inch Span for 3-Inch Receivers

Overview

The TowWorks 79831 Keyed Unique hitch lock combines extended reach with dependable security for your trailer setup. The 5/8-inch diameter pin offers an active length of up to 4-1/2 inches, giving you flexibility across adjustable hitches and channel mounts. With two keys per lock, you gain quick access while keeping your gear protected when you’re away from the vehicle.

Designed for versatility

Built to fit a range of adjustable hitches and CURT channel style mounts, including models 45900, 45901, 45902, and adjustable pintle hooks 45907, 45908. Important: this lock does not fit FASTWAY adjustable hitches. Before purchasing, measure your hitch to ensure a precise fit and avoid gaps that could affect security.

• Extra-long pin length helps secure thicker or deeper hitch tubes and adjustable channel mounts.
• Push lock design enables smooth operation with a 1/4 turn action for locking and unlocking.
• Two tubular keys per lock provide straightforward, reliable access when you need it.

Safety, protection, and quiet use

A separate spring clip (cotter pin) adds an additional safety option, and can be used with or without the main lock. Rubber O rings help minimize rattling and keep the pin steady, though some hitch tubes may require adjusting the number of O rings for a snug fit. A watertight dust cap guards the locking mechanism against moisture and corrosion, helping it perform reliably in varying weather conditions.

• Spring clip option enhances security during transport or storage.
• Rubber O rings reduce movement and rattling across different brands of receivers.
• Watertight dust cap protects internal components from moisture and rust.

Key benefits and practical use

Each lock is keyed unique, so you can manage security across individual setups without duplicating access. If you prefer two or more locks with the same key, consider model 79830 and specify quantity to match your needs.

Real-world scenarios

Picture hitching a cargo carrier or bike rack to a 3-inch receiver, then detaching it at your destination with minimal effort. The extended pin length accommodates thicker mounting hardware, while the push-lock mechanism makes securing fast and painless in everyday use.

Usage tips

To maximize performance, verify pin length against your hitch’s active length, and adjust O rings for a snug fit with your specific brand. Keep the keys in a safe place to avoid loss, and inspect the dust cap for signs of wear over time.