Demco Autoslide 21K Sliding 5th Wheel Hitch | 4 Part Numbers

The Autoslide for heavier fifth wheels. The Demco 21K Autoslide carries 21,000 lb and still slides itself — rack-and-pinion gears, up to 14" of rearward travel, no pin to pull — with a double-pivot head and polyurethane bumpers for quiet, easy coupling and a wrap-around jaw with locking bar around the king pin.

Options

• 8550062 — 21K Autoslide Ultra, UMS mount
• 8550063 — 21K Autoslide Ultra, UMS mount
• 6107 — 21K Autoslide

⚠️ Mounting System & Freight

Each part number pairs the hitch with a specific mounting system (industry-standard rails, Ultra above-bed, or UMS under-bed). The base rails or frame brackets for your truck are sold separately unless noted. Confirm the part number against Demco's application guide or send us your truck's year, make, model and bed length. Ships by truck freight.

Key Features

• 21,000 lb capacity
• Automatic rack-and-pinion slide — up to 14" of travel, no handle to pull
• Wrap-around jaw with locking bar
• No locking plate for standard pin boxes
• 3 vertical height adjustments
• Limited 5-year warranty
• Double-pivot head, polyurethane bumpers
• Low profile, easy maintenance access
• Made in USA

Specifications

• Brand: Demco
• Type: Sliding 5th Wheel Hitch
• Model: Autoslide 21K
• Options: 8550062; 8550063; 6107
• Weight: 263–338 lb (freight)