6650-00-622-4990

Find complete technical information, availability, and procurement data for: 6650-00-622-4990
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Federal Supply Group

Instruments and Laboratory Equipment

Federal Supply Classification

6650 Components and Accessories Test Equipment Optical Instruments

National Stock Number

6650-00-622-4990

Item Name Code

21884

Assigment Date

01/01/1963 (63 years ago)

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.

0.280 inches nominal and 0.118 inches nominal axial thickness, 8.608 inches back focal length, 0.398 inches nominal compound lens overall axial thickness, 1.696 inches minimum and 1.699 inches maximum diameter, 8.819 inches equivalent focal length

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Diameter: 1.696 inches minimum and 1.699 inches maximum
Axial Thickness: 0.280 inches nominal and 0.118 inches nominal
Compound Lens Overall Axial Thickness: 0.398 inches nominal
Equivalent Focal Length: 8.819 inches
Back Focal Length: 8.608 inches
Front Focal Length: 8.210 inches
Refraction Index: 1.5125 nominal and 1.6210 nominal
Abbe Constant: 60.500 and 36.200
Compound Lens Style: doublet
Individual Lens Style: double convex and plano-concave
Element Left Surface Radius: 3.668 inches
Element Right Surface Radius: 3.668 inches
Material: glass optical
Material Document And Classification: mil-g-174, class 1, grade c, form plates mil spec single material response

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
8289293	Optical Instrument Lens

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 6650-00-622-4990?

The FSCG of the NSN 6650-00-622-4990 is 6650

Does the NSN 6650-00-622-4990 have a Schedule B code assigned?

Yes, the Schedule B code is 9018500000

Does NSN 6650-00-622-4990 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 6650-00-622-4990 contain precious materials?

Precious metal content is unknown

Does NSN 6650-00-622-4990 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 6650-00-622-4990 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963