AFZZ Dump Trailer Cam Lock Door Assembly Set of 4 — Black Anti-Rust Keepers, Direct-Fit Replacement

These four cam lock keepers (A, B, C and D) are engineered to slip over vertically mounted cam bar door brackets and latch securely at the upper-left and lower-right door stops on common dump and cargo trailers. The kit replaces common part numbers such as 383200 and PLR158 and is sized for a direct fit so you don’t need to redrill or rework your trailer’s framework.

What exactly does this cam lock set do for my trailer?

The cam locks act as keepers for the trailer’s cam bar, holding double or single doors tightly closed during transit and storage. They give a keyless, mechanical stop that prevents the cam bar from shifting out of place.

• Prevents accidental door opening while hauling or parked
• Works with both rear and side mounting positions
• Replaces common OEM keepers without altering door layout
• Provides a simple, mechanical locking point without keys

How do I know these will fit my trailer’s cam bar and door stops?

AFZZ designed the assembly to match common trailer dimensions: 1.35" width, 5.10" length, and 3.90" bolt center, with a camshaft roughly 1" long, 1.5" wide and 0.8" thick. Because the kit matches typical bolt centers and camshaft size, most installations require no drilling or modification.

• Measure bolt centers and camshaft thickness to confirm compatibility
• Direct replacement for Part # 383200 and PLR158 in many trailers
• Fits over vertically mounted cam bar door brackets
• Designed for plug-and-play swap with existing keepers

What materials and finish are used, and how do they hold up outside?

The keepers are built from heavy-duty metal and finished with a black anti-rust coating applied through a specialized process. This surface treatment resists oxidation and wear better than ordinary zinc plating, improving service life in wet or salty environments.

• Durable metal construction for heavy-use durability
• Black anti-rust coating reduces corrosion risk
• Finish resists flaking and peeling common to some coatings
• Suitable for frequent outdoor and commercial use

How simple is the installation and maintenance?

Installation is straightforward: align the keeper over the cam bar bracket, secure to existing bolt centers, and test the cam engagement. Routine maintenance is minimal — periodic inspection and light lubrication of the cam shaft help ensure consistent operation.

• No complex tools or welding required for standard installs
• Suggested periodic inspection and light lubricant on moving surfaces
• Replaceable as a complete set for consistent wear management
• Keyless design eliminates lost-key issues

Who is this for: AFZZ’s Dump Trailer Cam Lock Door Assembly set is aimed at fleet managers, contractors, landscapers, and owners of dump or cargo trailers who need a robust, no-fuss solution to keep doors secure. If you operate trailers in construction, waste hauling, agriculture, or delivery services and want a durable keeper that installs without modifying your door frame, this set is built for your needs.