Hey @
The14thDr !
GRAFLEX Glass Eye Measurements (for a Folmer Flat Beveled Style Eye) by ~Ridire Firean as measured today, January 8, 2018:
Knurled Edge Diameter = 49/64"
Knurled Edge Thickness = 3/32"
Knurled Edge Flat Top Ring Width= 5/128"
Depth of Knurling = 1/64"
Knurling Ridge to Ridge Tooth Spacing = 1/32"
Knurl Ridges/Teeth = 55
Knurl Ridge/Teeth Bevel Top Side ONLY Depth = 1/64"
Overall Height (Spring not included) = 3/8"
Thread Diameter = 79/128"
Thread Height = 5/32"
Unthreaded Shaft Outer Diameter = 9/16"
Unthreaded Shaft Outer Height = 1/8"
Unthreaded Shaft Inner Diameter = 1/2"
Unthreaded Shaft Inner Height up from bottom to Spring Retaining Cutout Ring = about 1/16"
Spring Retaining Cutout Ring Height = about 1/16"
Spring Retaining Cutout Ring Depth = about 1/64"
Above Spring Retaining Cutout Ring Inner Shaft Width/Diameter where the Glass Eye sits beneath the hole down the center= 31/64"
Overall Inner Shaft Depth = 7/32"
Visible Glass Eye Diameter (when looking at it when it's installed on the flash) aka the hole down the center = 27/64"
Inner Bevel Lip = 1/64"-3/128" (it's very difficult to see, but you can see it!)
Actual Glass Eye Diameter = 31/64"
Actual Glass Eye Height = 29/128"
Actual Glass Eye Sidewall Thickness = 11/128"
Actual Glass Eye Lip (before the Dome of the Eye justs up out of the Sidewall) 1/128"-1/64"
Spring Height all by itself = 19/32"
Spring Width all by itself = 71/128"
Spring Width at the smaller end = 25/64"
There are 4 loops? of the Spring between the ends of its wire, and 7/32" overlap between its ends when looking down upon it (through the center, not from the side).
Spring Wire Diameter = 1/32"
If that doesn't get you more accurate, it will at least get your model very, very, very close to being a lot like my Flat Beveled Glass Eye! Depending on your modeling skills of course.
Can someone pass me the Visine now and help me uncross my eyes?