Locking plate engineered to bolt onto a Lippert Rhino pin box, keeping the king pin from rotating inside a Demco Autoslide fifth-wheel hitch head. Made from carbide black powder-coated steel for a corrosion-resistant, secure connection between your 5th wheel and hitch.
The Demco 6479 Capture Plate bolts directly onto a Lippert Rhino pin box to prevent the king pin from pivoting inside a Demco Autoslide fifth-wheel trailer hitch. Lippert Rhino pin boxes are narrower than standard pin boxes, so they don't fully engage the capture plates built into the Autoslide hitch head on their own — this locking plate closes that gap and locks the connection into place.
Installation is a simple bolt-on process, and the kit ships with all the hardware needed to complete the job. The plate itself is finished in a durable, corrosion-resistant carbide black powder coat designed to hold up to years of towing.
Prevents the king pin from pivoting inside your Demco Autoslide hitch head
Complete hardware kit included — capture plate, clamp plates, bolts, and jam nuts
Carbide black powder coat protects against rust and wear on the road
Manufactured domestically and backed by a 5-year limited warranty
The Demco 6479 is designed specifically for use with Lippert Rhino pin boxes paired to a Demco Autoslide 5th wheel hitch (13K, 18K, and 21K capacities). It replaces the earlier Demco 6335 locking plate. Part Number: 6479 | Replaces: Demco 6335
Confirm your pin box is a genuine Lippert Rhino pin box before ordering — it will be labeled "Rhino" on the sides and/or front. This plate is intended for use with a Demco Autoslide 5th wheel hitch head; it is not a universal fit for other hitch brands. California Prop 65 Notice: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
General Installation Steps: 1. Position Capture Plate: Place the capture plate adapter base around the king pin on the Lippert Rhino pin box 2. Attach Clamp Plates: Position the two clamp push plates against the pin box 3. Secure Hardware: Bolt the assembly together using the included bolts and jam nuts 4. Torque to Spec: Tighten all hardware fully per the included instructions to eliminate play 5. Test Fit: Connect to the Demco Autoslide hitch head and confirm the pin box no longer rotates
In The Box: • Capture Plate Adapter Base • Two (2) Clamp Push Plates • Four (4) Bolts • Four (4) Jam Nuts • Installation Instructions
Because Lippert Rhino pin boxes are narrower than the standard width most Demco Autoslide hitches are built for, a locking plate is required to properly secure the connection and protect the slider mechanism from unnecessary wear.
Technical Support: Demco Customer Service Phone: 1-800-543-3626 Warranty Information: 5-Year Limited Manufacturer's Warranty Covers defects in materials and workmanship under normal use Manufacturer: Demco Products