National Item Identification Number

01-258-0810
012580810
6650-01-258-0810
6650012580810

National Stock Number

Item Name

RING,RETAINING,OPTICAL ELEMENT

Federal Supply Class

6650

Description

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.

Commercial and Government Entity Code (Supplier Data)

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04939

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Reference Numbers (Part Numbers)

13076704
13076704

Required Categories

MATERIAL
SURFACE TREATMENT
THREAD LOCATION
THREAD SIZE
SCREW THREAD SERIES D

Required Description

STEEL
PASSIVATED
INTERNAL
2 13/16-32
UNS
2B
2.7762 TO 2.8100 INCHES
0.230