Demco UMS Under-Mount 5th Wheel Base Rail & Bracket Kit | 8 Options

Pull the hitch and get your bed back. The Demco UMS (Under Mount Series) anchors below the bed so nothing is left above the floor when the hitch comes out; these are the adapter, base rails, and truck-specific brackets for UMS hitches.

Options

• 6200 — adapter plate, Under Mount Series hitches
• 6140 — UMS adapter plate for Hijacker Premier Series hitches
• 8551012 — UMS base rail kit (5-year warranty)
• 8551008 — UMS base rail kit (Hijacker UMS)
• 8551013 — UMS base rail kit
• 8552031, 8552032 — frame brackets, UMS / Premier / SL-Series hitches
• 8552038 — frame brackets, Under Mount Series

⚠️ Vehicle Fitment Required

Demco frame brackets and base rails are truck-specific — the same part number fits only the year, make, model, and bed length Demco's application guide assigns it to. Before ordering, confirm the part number against Demco's fifth wheel application guide for your truck, or send us your truck's year, make, model, bed length, and hitch series (Premier, SL, UMS, Hijacker, Autoslide) and we'll verify. Drilling may be required. Ships freight on heavier kits.

Key Features

• Under-bed mounting — bed stays clear
• Truck-specific brackets
• Made in USA, ISO 9001:2015

Specifications

• Brand: Demco
• Type: 5th Wheel Mount Kit
• Series: UMS
• Options: 6200; 8551008; 8551013; 8552031; 8552032; 8552038