1240-00-210-4396

Find complete technical information, availability, and procurement data for: 1240-00-210-4396
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Federal Supply Group

Fire Control Equipment

Federal Supply Classification

1240 Optical Sighting and Ranging Equipment

National Stock Number

1240-00-210-4396

Item Name Code

22451

Assigment Date

01/01/1963 (63 years ago)

A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see cell, optical element. Excludes:ring, externally threaded.

0.247 inches minimum and 0.253 inches maximum overall length, 4 hole or slot quantity, 1.457 inches minimum and 1.462 inches maximum hole diameter, 0.122 inches minimum and 0.128 inches maximum recess depth, 1.541 inches minimum and 1.543 inches maximum 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: 1.457 inches minimum and 1.462 inches maximum
Overall Length: 0.247 inches minimum and 0.253 inches maximum
Hole Or Slot Quantity: 4
Recess Diameter: 1.541 inches minimum and 1.543 inches maximum
Recess Depth: 0.122 inches minimum and 0.128 inches maximum
Diameter: 0.079 inches nominal
Thread Size: 1.874 in.-32
Depth: 0.250 inches nominal
End Item Identification: telescope
Drive Type: drilled hole
Drive Facility Angular Spacing In Deg: 90.0
Radius From Geometric Axis To Hole Center: 0.856 inches minimum and 0.862 inches maximum
Guide Design: thread chamfer
Guide Location: both edges
Internal Annular Serration: not provided
Setscrew Notch: not provided
Hole Chamfer Angle In Deg: 0.0
Hole Chamfer Diameter: 1.457 inches minimum and 1.462 inches maximum
Material: aluminum alloy
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
1390118	Optical Element Retainer
789PC4	Optical Element Retainer

FAQs

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

What is the FSCG of the NSN 1240-00-210-4396?

The FSCG of the NSN 1240-00-210-4396 is 1240

Does the NSN 1240-00-210-4396 have a Schedule B code assigned?

Yes, the Schedule B code is 9803200000

Does NSN 1240-00-210-4396 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 1240-00-210-4396 contain precious materials?

Item does not contain precious metal.

Does NSN 1240-00-210-4396 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 1240-00-210-4396 was assigned to the Federal Catalog?

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