National Item Identification Number
01-258-0811
012580811
6650-01-258-0811
6650012580811
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)
04939
Reference Numbers (Part Numbers)
13076701
13076701
Required Categories
MATERIAL
SURFACE TREATMENT
THREAD LOCATION
THREAD SIZE
SCREW THREAD SERIES D
Required Description
STEEL
PASSIVATED
EXTERNAL
3 45/64-32
UNS
2A
3.6603 TO 3.6986 INCHES
0.200