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Optical Element Retainer NSN 1240-00-210-4396

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 1240-00-210-4396 NSN: 1240-00-210-4396

Features and Characteristics

Hole Diameter
Between 1.457 inches and 1.462 inches
Overall Length
Between 0.247 inches and 0.253 inches
Hole Or Slot Quantity
4
Recess Diameter
Between 1.541 inches and 1.543 inches
Recess Depth
Between 0.122 inches and 0.128 inches
Diameter
0.079 inches
Thread Size
1.874 in.-32
Depth
0.250 inches
End Application
Telescope
Drive Type
Drilled hole
Drive Facility Angular Spacing In Deg
90.0
Radius From Geometric Axis To Hole Center
Between 0.856 inches and 0.862 inches
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
Between 1.457 inches and 1.462 inches
Material
Aluminum alloy
Material
Aluminum alloy
Style Designator
Recessed
Surface Treatment
Anodized black
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
002104396
NSN
1240002104396

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
789PC4
Cage Code:
02622
Status:
A
MSDS:
Part Number:
1390118
Cage Code:
10001
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 1240-00-210-4396
What are the manufacturers of nsn 1240002104396?
Does this nsn 1240002104396 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240002104396
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 1240002104396 contain any precious metals?
No precious metal content.
Does nsn 1240002104396 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240002104396?
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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