6650-00-157-4139

Find complete technical information, availability, and procurement data for: 6650-00-157-4139
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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

6650-00-157-4139

Item Name Code

21884

Assigment Date

01/01/1963 (63 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.

7.250 centimeters equivalent focal length, rangefinder mk42 end item identification, 29.0 millimeters nominal diameter, 2.0 millimeters nominal and 9.0 millimeters nominal axial thickness, 11.0 millimeters nominal compound lens overall 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: 29.0 millimeters nominal
End Item Identification: rangefinder mk42
Axial Thickness: 2.0 millimeters nominal and 9.0 millimeters nominal
Compound Lens Overall Axial Thickness: 11.0 millimeters nominal
Equivalent Focal Length: 7.250 centimeters
Back Focal Length: 7.456 centimeters
Refraction Index: 1.6490 nominal and 1.5185 nominal
Abbe Constant: 33.800 and 59.600
Compound Lens Style: dialyte
Individual Lens Style: meniscus diverging and double convex
Element Left Surface Radius: 8565.0 millimeters and 28.2 millimeters
Element Right Surface Radius: -28.2 millimeters and 28.7 millimeters
Material: glass optical
Material Document And Classification: jan-g-174 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
203034PC15	Optical Instrument Lens
799640PC1	Optical Instrument Lens
G8110PC15	Optical Instrument Lens

FAQs

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

What is the FSCG of the NSN 6650-00-157-4139?

The FSCG of the NSN 6650-00-157-4139 is 6650

Does the NSN 6650-00-157-4139 have a Schedule B code assigned?

Yes, the Schedule B code is 9018500000

Does NSN 6650-00-157-4139 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 6650-00-157-4139 contain precious materials?

Item does not contain precious metal.

Does NSN 6650-00-157-4139 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 6650-00-157-4139 was assigned to the Federal Catalog?

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