T-SM3RR - SM3 Retaining Ring for Ø3" Lens Tubes and Mounts
T-SM3RR - SM3 Retaining Ring for Ø3" Lens Tubes and Mounts
- Standard Retaining Rings for Optics Ranging from Ø75 mm to Ø4"
- Thread SM3 (3.035"-40)
-
Thickness 0.10" (2.5 mm)
- Compatible Optic Mounts Any Internally SM3-Threaded Mount
- Clear Aperture Ø2.81" (Ø71.4 mm)
- Compatible Spanner Wrench T-SPW605 or T-SPW801
| T-SM3 (3.035"-40.0) Threading | |||
|---|---|---|---|
| Internal Thread, UNS-2B | External Thread, UNS-2A | ||
| Min Major Diameter | 3.0350" | Max Major Diameter | 3.0337" |
| Min Pitch Diameter | 3.0188" | Min Major Diameter | 3.0286" |
| Max Pitch Diameter | 3.0242" | Max Pitch Diameter | 3.0175" |
| Min Minor Diameter (and 83.3% of Thread) |
3.008" | Min Pitch Diameter | 3.0133" |
| Max Minor Diameter (and 64.9% of Thread) |
3.014" | Max Minor Diameter | 3.0066" |