Dave Sr. from SWISCO responded:
August 14, 2017
Your glazing bead looks like it could be an older version of the Andersen 55-301. A few years back, Andersen changed the design, so it won't be exact. The 55-301 is used on the newer type of 5/8" thick insulated glass. I would also take a look at the 55-303 beading used on the older 3/8" insulated glass. See what you think.
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