T-SM05RR - SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts
T-SM05RR - SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts
Thread SM05 (0.535"-40)
Thickness 0.07" (1.7 mm)
Clear Aperture Ø0.44" (Ø11.0 mm)
| Internal Thread, UNS-2B | External Thread, UNS-2A | ||
| Min Major Diameter | 0.5350" | Max Major Diameter | 0.5340" |
| Min Pitch Diameter | 0.5188" | Min Major Diameter | 0.5289" |
| Max Pitch Diameter | 0.5230" | Max Pitch Diameter | 0.5178" |
| Min Minor Diameter (and 83.3% of Thread) |
0.508" | Min Pitch Diameter | 0.5146" |
| Max Minor Diameter (and 64.9% of Thread) |
0.514" | Max Minor Diameter | 0.5069" |
Our Standard Retaining Rings are manufactured from anodized aluminum and are offered in sizes to match our optic mounts and lens tubes.
They maximize the clear aperture while providing sufficient holding force. Securing an optic using a retaining ring is a stable method for holding the optic since the optic is retained along its entire edge instead of just at a few points.
Each retaining ring is machined with two slots for compatibility with our selection of spanner wrenches.