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Optical Element Retainer NSN 1240-01-320-1691

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 1240-01-320-1691 NSN: 1240-01-320-1691

Features and Characteristics

Overall Length
Between 0.115 inches and 0.135 inches
Recess Depth
Between 0.030 inches and 0.050 inches
Thread Size
1.980 in.-32
Guide Design
Thread chamfer
Guide Location
Both edges
Internal Annular Serration
Not provided
Setscrew Notch
Not provided
Hole Chamfer Angle In Deg
41.0
Material
Plastic
Material
Plastic
Style Designator
Recessed
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
013201691
NSN
1240013201691

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
13077320-501
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 1240-01-320-1691
What are the manufacturers of nsn 1240013201691?
Does this nsn 1240013201691 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240013201691
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 1240013201691 contain any precious metals?
No precious metal content.
Does nsn 1240013201691 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240013201691?
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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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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