6650-00-820-4577

Find complete technical information, availability, and procurement data for: 6650-00-820-4577
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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

6650-00-820-4577

Item Name Code

21884

Assigment Date

01/01/1963 (63 years ago)

An item containing two or more electrodes across which an electric spark is discharged to ignite a fuel and air mixture, primarily in internal combustion engines. Excludes:glow plug; electrode.

23.416 centimeters equivalent focal length, 9.000 millimeters nominal compound lens edge thickness, 11.500 millimeters nominal compound lens overall axial thickness, 7.000 inches nominal and 4.500 inches nominal axial thickness, 50.000 millimeters nominal diameter

Product Characteristics

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

Diameter: 50.000 millimeters nominal
Axial Thickness: 7.000 inches nominal and 4.500 inches nominal
Compound Lens Overall Axial Thickness: 11.500 millimeters nominal
Compound Lens Edge Thickness: 9.000 millimeters nominal
Equivalent Focal Length: 23.416 centimeters
Back Focal Length: 22.030 centimeters
Front Focal Length: 24.145 centimeters
Refraction Index: 1.6170 nominal and 1.6890 nominal
Abbe Constant: 55.000 and 30.900
Compound Lens Style: doublet
Individual Lens Style: plano-convex and plano-concave
Element Left Surface Radius: 72.460 millimeters and 485.290 millimeters
Element Right Surface Radius: 485.290 millimeters and 158.060 millimeters
Material: glass

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
68-701	Optical Instrument Lens

FAQs

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

What is the FSCG of the NSN 6650-00-820-4577?

The FSCG of the NSN 6650-00-820-4577 is 6650

Does the NSN 6650-00-820-4577 have a Schedule B code assigned?

Yes, the Schedule B code is 9018500000

Does NSN 6650-00-820-4577 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 6650-00-820-4577 contain precious materials?

Item does not contain precious metal.

Does NSN 6650-00-820-4577 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 6650-00-820-4577 was assigned to the Federal Catalog?

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