T-SM20RR - M20.5 x 0.5 Retaining Ring for Ø20 mm Lens Mounts
- Standard Retaining Rings for Optics Ranging from Ø13 mm to Ø1"
- Retaining Rings with RMS (0.800"-36) and C-Mount (1.00"-32) Threads Available
- Thread M20.5 x 0.5
- Thickness 0.08" (2.0 mm)
- Compatible Spanner Wrench T-SPW801
- Clear Aperture Ø0.68"(Ø17.3 mm)
| M20.5 x 0.5 Threading | |||
|---|---|---|---|
| Internal Thread | External Thread | ||
| Min Major Diameter | 20.500 mm | Max Major Diameter | 20.479 mm |
| Min Pitch Diameter | 20.175 mm | Min Major Diameter | 20.371 mm |
| Max Pitch Diameter | 20.297 mm | Max Pitch Diameter | 20.155 mm |
| Min Minor Diameter (and 83.3% of Thread) |
19.959 mm | Min Pitch Diameter | 20.062 mm |
| Max Minor Diameter (and 64.9% of Thread) |
20.094 mm | Max Minor Diameter | 19.938 mm |