National Item Identification Number
01-355-5521
013555521
5855-01-355-5521
5855013555521
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)
53711
Reference Numbers (Part Numbers)
803-6404752-201
Required Categories
STYLE DESIGNATOR
SHOULDER DIAMETER
SHOULDER LENGTH
HOLE DIAMETER
OVERALL LEN
Required Description
F4 SHOULDERED
2.190 INCHES NOMINAL
0.120 INCHES NOMINAL
1.750 INCHES NOMINAL;