I do not see F04/1 referenced in any of the literature of the manufacturers that I am familiar with, including Arrow, Corbin, Falcon, Sargent, Schlage and Yale. I am not an expert on ANSI, but I know who is!
I went to Lori Greene's blog and asked her. If anyone would know, she would!
http://www.allexperts.com/ep/3546-11579 … Greene.htm
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