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Optical Element Retainer NSN 1240-01-321-0251

Item Description

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.

NSN 1240-01-321-0251 NSN: 1240-01-321-0251

Features and Characteristics

Hole Diameter
0.750 inches
Overall Length
0.400 inches
Drive Type
Knurl
Material
Plastic
Material
Plastic
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
013210251
NSN
1240013210251

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
799204832-001
Cage Code:
04939
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 9803200000
  • NAICS: 990000
  • SITC: 93100
  • Description: Military equipments not identified by kind
  • End Use (Code 50060):
    Military apparel and footwear

Q & A

Frequently asked questions for NSN 1240-01-321-0251
What are the manufacturers of nsn 1240013210251?
Does this nsn 1240013210251 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240013210251
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.
Does nsn 1240013210251 contain any precious metals?
Precious metal content is unknown.
Does nsn 1240013210251 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240013210251?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
22451
FIIG:
T271-K
App. Key:
KA
Cond. Code:
2
Status:
A

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  •   Certificate of Conformance
  •   Quality Inspected Parts
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