7577961

View detailed technical data, stock status, and sourcing information for: 7577961
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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

6650-00-757-7961

Item Name Code

21884

Assigment Date

01/01/1962 (64 years ago)

An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see window, optical instrument. Excludes:reticle, optical instrument.

0.502 inches nominal compound lens edge thickness, 3.708 inches equivalent focal length, 2.218 inches nominal diameter, 0.903 inches nominal compound lens overall axial thickness, 0.772 inches nominal and 0.131 inches nominal axial thickness

Product Characteristics

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

Diameter: 2.218 inches nominal
Axial Thickness: 0.772 inches nominal and 0.131 inches nominal
Compound Lens Overall Axial Thickness: 0.903 inches nominal
Compound Lens Edge Thickness: 0.502 inches nominal
Equivalent Focal Length: 3.708 inches
Back Focal Length: 3.288 inches
Refraction Index: 1.5170 nominal and 1.6490 nominal
Abbe Constant: 64.500 and 33.800
Compound Lens Style: doublet
Individual Lens Style: double convex and meniscus diverging
Element Left Surface Radius: -1.709 inches and 2.563 inches
Element Right Surface Radius: -4.196 inches and 1.709 inches
Material: glass optical
Material Document And Classification: jan-g-174, grade c mil spec single material response
Fsc Application Data: telescope,integrated with fire control

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
7577961	Optical Instrument Lens

FAQs

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

What is the FSCG of the NSN 6650-00-757-7961?

The FSCG of the NSN 6650-00-757-7961 is 6650

Does the NSN 6650-00-757-7961 have a Schedule B code assigned?

Yes, the Schedule B code is 9018500000

Does NSN 6650-00-757-7961 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 6650-00-757-7961 contain precious materials?

Precious metal content is unknown

Does NSN 6650-00-757-7961 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 6650-00-757-7961 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962