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T-SM13RR - M13.5 x 0.5 Retaining Ring for Ø13 mm Lens Mounts

Fosco Connect Part No.: T-SM13RR

  • $ 18.00 or



T-SM13RR - M13.5 x 0.5 Retaining Ring for Ø13 mm Lens Mounts

Product Drawing

  • 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 M13.5 x 0.5
  • Thickness 0.07" (1.7 mm)
  • Compatible Spanner Wrench T-SPW801
  • Clear Aperture Ø0.43" (Ø10.9 mm)
M13.5 x 0.5 Threading
Internal Thread External Thread
Min Major Diameter 13.500 mm Max Major Diameter 13.480 mm
Min Pitch Diameter 13.175 mm Min Major Diameter 13.371 mm
Max Pitch Diameter 13.292 mm Max Pitch Diameter 13.155 mm
Min Minor Diameter
(and 83.3% of Thread)
12.959 mm Min Pitch Diameter 13.066 mm
Max Minor Diameter
(and 64.9% of Thread)
13.094 mm Max Minor Diameter 12.938 mm
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