National Item Identification Number
01-171-2817
011712817
5855-01-171-2817
5855011712817
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)
13074744
13074744
Required Categories
STYLE DESIGNATOR
SHOULDER LENGTH
HOLE DIAMETER
OVERALL LENGTH
FLANGE DIAMETE
Required Description
F4 SHOULDERED
0.260 INCHES NOMINAL
1.720 INCHES NOMINAL
0.300 INCHES NOMINAL;