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Knox Trailers · Trailer Parts
UCP00040-L
In stock · ships from Knoxville
This is a left-hand roadside wing plate, also called an air spring plate assembly, for a trailer’s air ride suspension system.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It bolts to the trailer frame and provides a secure mounting point for the air spring. This plate is replaced when the original becomes bent, cracked, or severely corroded, which can lead to improper axle alignment and air spring failure. Always confirm correct side and orientation before installation.
Part Number: UCP00040-L
LG MNT. BRKT. VG LH
Unit: ea
Dealer: Knox Trailers
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