789PC3

Optical element retaining ring

789PC3 Description

Right-hand , 0.495 inches thread length, 0.759 inches overall length, 1.828 inches outside diameter, 1.451 inches aperture diameter.

Properties of 789PC3

Thread Direction:
Right-hand
Thread Length:
0.495 inches
Overall Length:
Between 0.759 inches and 0.765 inches
Outside Diameter:
Between 1.828 inches and 1.829 inches
Aperture Diameter:
Between 1.451 inches and 1.457 inches
End Application:
Telescope
Mounting Configuration:
Three 0.063 in. Diameter lock screws
Thread Location:
Internal
Internal Flange Thickness:
Between 0.020 inches and 0.040 inches
Knurled Periphery:
Not provided
Material:
Aluminum alloy
Material:
Aluminum alloy
Surface Treatment:
Anodized black
NSN:
1240-00-210-4395
Description:
Ring,retaining,optical Element
Cage Code:
78039

Definition Optical Element Retaining Ring

A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see retainer, optical element. Excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.

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Last modified 11/02/2024