T-SM2LTRR - SM2 (2.035"-40) Stress-Free Retaining Ring
T-SM2LTRR - SM2 (2.035"-40) Stress-Free Retaining Ring
- Design Provides Reduced Stress Clamping Action
- Provides Light-Tight Seal Around an Optic
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Our Stress-Free Retaining Rings are available with our standard SM05, SM1, or SM2 threadings.
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This design uses an O-ring made of Buna-N nitrile rubber to reduce the stress on the optic surface and completely seal out sources of stray light.
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Like our standard retaining rings, our stress-free retaining rings contain two slots for compatibility with our selection of spanner wrenches.
Due to the rubber O-ring, the clear aperture is slightly reduced relative to our standard retaining rings.
- Thread SM2 (2.035"-40)
- Thickness 0.18" (4.6 mm)
- Compatible Optic Mounts Any Internally SM2-Threaded Mount
- Compatible Spanner Wrench
| Internal Thread, UNS-2B | External Thread, UNS-2A | ||
| Min Major Diameter | 2.0350" | Max Major Diameter | 2.0338" |
| Min Pitch Diameter | 2.0188" | Min Major Diameter | 2.0287" |
| Max Pitch Diameter | 2.0239" | Max Pitch Diameter | 2.0176" |
| Min Minor Diameter (and 83.3% of Thread) |
2.008" | Min Pitch Diameter | 2.0137" |
| Max Minor Diameter (and 64.9% of Thread) |
2.014" | Max Minor Diameter | 2.0067" |