Kodak (enlarger) lens flanges & retaining rings - my dumb mistake

[Will Frostmill]

So, I made that classic e*** mistake - buying the slightly cheaper thing in a hurry, and not remembering to get the slightly more expensive thing that comes with the flange.

So! I bought an Enlarging Ektanon, 162mm f/4.5, and I'm trying to figure out what I can use to screw it on to a board. The 162mm lens is apparently the same thing as a 6 and 3/8" so I went looking at Brian Wallen's Kodak lens sitehttp://www.bnphoto.org/bnphoto/KodakEktarsDB6-Enlg.htm, and found this:

Adapter ring size: 50.5
Lens Attachment Series: VII

But also this:
Retaining Ring Part Number: HE26949
Kodak Enlarging Lens Flange: Number 6

So, since Series VII filters are 50.5mm, would the female ring work as a retaining ring? Surely Kodak would've used the same thread pitch for as many different things as possible, right?

(That's probably too optimistic.)
Anyway, I'll attach the scans from the Kodak references here, in case anyone else needs this stuff later:




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