This is from a Pella storm door that I think is about 7 years old
A handy person from 60007 says:
September 14, 2015
As you can see the mounting holes are 1 3/4 inches apart and the square key is 5/16 x 5/16 x 3. All I need is the white part. Thanks for you help!
Tom from SWISCO responded:
September 16, 2015
Take a look at our 40-150. Do you think this could work for you? It comes with a removable spindle insert, to accommodate two sizes. It can use a 1/8" spindle with the insert and a 3/8" spindle without it. Could this work for you?