1240-00-520-4660

Find complete technical information, availability, and procurement data for: 1240-00-520-4660
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Federal Supply Group

Fire Control Equipment

Federal Supply Classification

1240 Optical Sighting and Ranging Equipment

National Stock Number

1240-00-520-4660

Item Name Code

22585

Assigment Date

01/01/1960 (66 years ago)

2.527 inches minimum and 2.529 inches maximum outside diameter, 2.292-36ns-3b internal theads around aperture mounting configuration, 2.2619 inches minimum and 2.2649 inches maximum aperture diameter, 2.406 inches nominal groove diameter, 0.062 inches nominal inner groove width

Product Characteristics

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

Groove Diameter: 2.406 inches nominal
Outside Diameter: 2.527 inches minimum and 2.529 inches maximum
Aperture Diameter: 2.2619 inches minimum and 2.2649 inches maximum
Inner Groove Width: 0.062 inches nominal
Mounting Configuration: 2.292-36ns-3b internal theads around aperture
Thread Location: internal
Internal Flange Thickness: 0.219 inches nominal
Groove Location: adjacent to internal flange
Material: steel corrosion resisting

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
5204660	Optical Element Retaining Ring

FAQs

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

What is the FSCG of the NSN 1240-00-520-4660?

The FSCG of the NSN 1240-00-520-4660 is 1240

Does the NSN 1240-00-520-4660 have a Schedule B code assigned?

Yes, the Schedule B code is 9803200000

Does NSN 1240-00-520-4660 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 1240-00-520-4660 contain precious materials?

Item does not contain precious metal.

Does NSN 1240-00-520-4660 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 1240-00-520-4660 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960