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T-SM12RR - M12.5 x 0.5 Retaining Ring for Ø12 mm Lens Mounts

Fosco Connect Part No.: T-SM12RR

  • $ 18.25 or



T-SM12RR - M12.5 x 0.5 Retaining Ring for Ø12 mm Lens Mounts

Product Drawing

Thread M12.5 x 0.5
Thickness 0.07" (1.7 mm)
Clear Aperture Ø0.40" (Ø10.2 mm)
Internal Thread External Thread
Min Major Diameter 12.500 mm Max Major Diameter 12.480 mm
Min Pitch Diameter 12.175 mm Min Major Diameter 12.374 mm
Max Pitch Diameter 12.291 mm Max Pitch Diameter 12.155 mm
Min Minor Diameter
(and 83.3% of Thread)
11.959 mm Min Pitch Diameter 12.067 mm
Max Minor Diameter
(and 64.9% of Thread)
12.099 mm Max Minor Diameter 11.938 mm

 

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.

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