National Item Identification Number
01-520-5989
015205989
6650-01-520-5989
6650015205989
National Stock Number
Item Name
SPACER,OPTICAL ELEMENT
Federal Supply Class
6650
Referenced on: http://firetrucksandequipment.tpub.com//TM-9-1240-375-34-P/0820360858.htm
Referenced on: http://firetrucksandequipment.tpub.com//TM-9-1240-375-34-P/0820360871.htmDescription
A tubular shaped item designed to maintain a predetermined distance between optical elements, such as lenses, reticles, and the like. The bore may be straight, tapered or counterbored, and may have annular serrations to converge or diverge light rays. The surfaces, which mate with the optics, are usually chamfered, concave, and/or have a specified finish designation in the range of 1 to 125 microinches arithmetical average (AA). See also SPACER, SLEEVE and CELL, OPTICAL ELEMENT.
Commercial and Government Entity Code (Supplier Data)
19200
NSN (National Stock Number) 6650-01-520-5989, 6650015205989 NIIN (National Identification Number) 01-520-5989, 015205989
Part Numbers (Reference Numbers)
13005033
Required Categories
III END ITEM IDENTIFICATION
Required Description
HOWITZER,TOWED,MED (155MM,M198)