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What Side of the Bolt Does the Washer Install On?  

Updated 06/17/2026 | Published 06/15/2026

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Question:

Ref 2 bolt demco hardware kit. Which side of the bolt does the washer go?

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Expert Reply:

Hi Robert,

When you're installing the Demco 2-Bolt Channel Mount Coupler Hardware Kit part # DM68UV, the washer will go onto the threaded end once the bolt is put through the frame and the lock nut tightened down onto the washer. I've included a photo showing the washer placement for reference.

What coupler are you installing with this hardware kit?

expert reply by:
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Claire H
Demco Channel Mount Coupler Hardware Kit part # DM68UV
Demco Channel Mount Coupler Hardware Kit part # DM68UV
(click to enlarge)

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