National Item Identification Number
01-180-2172
011802172
5855-01-180-2172
5855011802172
National Stock Number
Item Name
RETAINER,OPTICAL ELEMENT
Federal Supply Class
5855
Referenced on: http://www.tpub.com/content/aviationgenmaint/TM-1-1270-476-23P/css/TM-1-1270-476-23P_309.htm
Referenced on: http://www.tpub.com/content/aviationgenmaint/TM-1-1270-476-23P/css/TM-1-1270-476-23P_350.htmDescription
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
9Y204
NORMAN ENGINEERING CORPORATION
2579 N ORANGE BLOSSOM TRL
ORLANDO
FL
32804
407-425-6433
NSN (National Stock Number) 5855-01-180-2172, 5855011802172 NIIN (National Identification Number) 01-180-2172, 011802172
Part Numbers (Reference Numbers)
13075884
13075884
13075884
Required Categories
STYLE DESIGNATOR
SHOULDER LENGTH
HOLE DIAMETER
OVERALL LENGTH
FLANGE DIAMETE
Required Description
F4 SHOULDERED
0.170 INCHES NOMINAL
2.188 INCHES NOMINAL
0.420 INCHES NOMINAL;