T-SM05RR-P10 - SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts, 10 Pack product-series_te Radius R2 (mm): -40

Radius R2 (mm): -40

5" (inside dimensions)

E-47702 15mm Dia

but optional

T-SM05RR-P10 - SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts, 10 Pack product-series_te Radius R2 (mm): -40T SM05RR P10 SM05 Retaining Ring for 1 2" Lens Tubes and Mounts, 10 Pack Product Drawing Thread SM05 (0. 535" 40) Thickness 0. 07" (1. 7 mm) Clear Aperture 0. 44" (11. 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