Bottom Sash Spiral Balance Clip
A handy person from Norman, OK says:
July 15, 2014
I purchased a couple of the T14's (17-030) for use with the 21" Series 400 Spiral Balances (S400-21) which come in a little short. Looking at what you have available I don't see an exact match. I'm guessing maybe either the #54 (17-033) or the #32 (17-012) will work. But I'd rather not guess, so I defer to you with these photos.
Dave from SWISCO responded:
July 21, 2014