National Item Identification Number
01-171-2818
011712818
5855-01-171-2818
5855011712818
National Stock Number
Item Name
RETAINER,OPTICAL ELEMENT
Federal Supply Class
5855
Description
A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see CELL, OPTICAL ELEMENT. Excludes RING, EXTERNALLY THREADED.
Commercial and Government Entity Code (Supplier Data)
04939
Reference Numbers (Part Numbers)
13074684
13074684
Required Categories
STYLE DESIGNATOR
SHOULDER LENGTH
HOLE DIAMETER
OVERALL LENGTH
FLANGE DIAMETE
Required Description
F4 SHOULDERED
0.375 INCHES NOMINAL
2.950 INCHES NOMINAL
0.500 INCHES NOMINAL;