1240-00-157-9642

Find complete technical information, availability, and procurement data for: 1240-00-157-9642
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Federal Supply Group

Fire Control Equipment

Federal Supply Classification

1240 Optical Sighting and Ranging Equipment

National Stock Number

1240-00-157-9642

Item Name Code

22451

Assigment Date

01/01/1963 (63 years ago)

An optical system consisting of two or more lenses secured within a cylindrical sleeve. It is the component of an optical instrument nearest the eye of the observer when sighting. The distance between lenses is maintained by an optical element spacer. It usually has focusing facilities and may include a reticle, filter, and/or diopter scale.

2.000 in.-32 thread size, 1.718 inches nominal hole diameter, 0.195 inches nominal recess depth, 0.309 inches nominal overall length, 1.772 inches nominal recess diameter

Product Characteristics

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

Hole Diameter: 1.718 inches nominal
Overall Length: 0.309 inches nominal
Recess Diameter: 1.772 inches nominal
Recess Depth: 0.195 inches nominal
Thread Size: 2.000 in.-32
End Item Identification: gun sight mk15
Guide Design: thread chamfer
Guide Location: edge opposite drive edge
Internal Annular Serration: not provided
Setscrew Notch: not provided
Hole Chamfer Angle In Deg: 45.0
Hole Chamfer Diameter: 1.820 inches nominal
Material: copper alloy
Surface Treatment: fnaaf0
Style Designator: recessed

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
481130PC1	Optical Element Retainer

FAQs

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

What is the FSCG of the NSN 1240-00-157-9642?

The FSCG of the NSN 1240-00-157-9642 is 1240

Does the NSN 1240-00-157-9642 have a Schedule B code assigned?

Yes, the Schedule B code is 9803200000

Does NSN 1240-00-157-9642 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 1240-00-157-9642 contain precious materials?

Item does not contain precious metal.

Does NSN 1240-00-157-9642 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 1240-00-157-9642 was assigned to the Federal Catalog?

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