7791929

Optical element retaining ring

7791929 Description

3b thread class, right-hand , 0.200 inches thread length, 0.340 inches overall length, 1.377 inches outside diameter, 1.312 in.-48 thread size.

Features

Drilled face drive type, two 0.077 in. Dia. Holes spaced 180 degrees apart on a 1.156 in. Bolt circle dia. On internal flange end.

Properties of 7791929

Thread Class:
3b
Thread Direction:
Right-hand
Groove Diameter:
Between 1.322 inches and 1.330 inches
Thread Length:
0.200 inches
Overall Length:
Between 0.340 inches and 0.341 inches
Outside Diameter:
Between 1.377 inches and 1.385 inches
Thread Size:
1.312 in.-48
Aperture Diameter:
Between 0.880 inches and 0.920 inches
Inner Groove Width:
Between 0.050 inches and 0.070 inches
Screw Thread Series Designator:
Uns
Thread Location:
Internal
Internal Flange Thickness:
Between 0.060 inches and 0.080 inches
Groove Location:
Adjacent to internal flange
Knurled Periphery:
Not provided
Material:
Brass, qq-b-626, comp 360, 1/2h
Material:
Brass, qq-b-626, comp 360, 1/2h
Surface Treatment:
Black oxide, mil-f-495
Surface Treatment:
Black oxide, mil-f-495
Fsc Application Data:
Sight, reflex
NSN:
1240-00-931-8901
Description:
Ring,retaining,optical Element
Cage Code:
19200

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 04/19/2024