8289250

View detailed technical data, stock status, and sourcing information for: 8289250
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Federal Supply Group

Fire Control Equipment

Federal Supply Classification

1240 Optical Sighting and Ranging Equipment

National Stock Number

1240-00-121-0797

Item Name Code

22451

Assigment Date

10/23/1968 (57 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.

1.450 inches minimum and 1.460 inches maximum hole diameter, 90.0 recess angle in deg, 0.062 inches minimum and 0.078 inches maximum width, 0.090 inches minimum and 0.100 inches maximum overall length, 2 hole or slot quantity

Product Characteristics

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

Hole Diameter: 1.450 inches minimum and 1.460 inches maximum
Width: 0.062 inches minimum and 0.078 inches maximum
Overall Length: 0.090 inches minimum and 0.100 inches maximum
Hole Or Slot Quantity: 2
Recess Angle In Deg: 90.0
Recess Depth: 0.070 inches nominal
Thread Size: 1.688 in.-32uns-2a
Depth: 0.030 inches minimum and 0.040 inches maximum
Drive Type: slotted
Drive Facility Angular Spacing In Deg: 180.0
Guide Design: thread chamfer
Guide Location: both edges
Internal Annular Serration: not provided
Setscrew Notch: not provided
Material: aluminum alloy 2024 or aluminum alloy 355.0 or aluminum alloy 6061 or aluminum alloy 6062
Material Document And Classification: ww-t-700/3 fed spec 1st material response or qq-a-225/6 fed spec 1st material response or mil-c-11866, comp 3, t6 mil spec 2nd material response or qq-a-200/8 fed spec 3rd material response or qq-a-225/8 fed spec 3rd material response or qq-a-250/11, t6 fed spec 3rd material response
Surface Treatment: anodize
Style Designator: recessed
Fsc Application Data: periscope,tank m32,m32c

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
8289250	Optical Element Retainer

FAQs

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

What is the FSCG of the NSN 1240-00-121-0797?

The FSCG of the NSN 1240-00-121-0797 is 1240

Does the NSN 1240-00-121-0797 have a Schedule B code assigned?

Yes, the Schedule B code is 9803200000

Does NSN 1240-00-121-0797 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 1240-00-121-0797 contain precious materials?

Item does not contain precious metal.

Does NSN 1240-00-121-0797 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 1240-00-121-0797 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Wed, Oct 23, 1968