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Optical Element Retainer NSN 1240-00-382-1478

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 1240-00-382-1478 NSN: 1240-00-382-1478

Features and Characteristics

Hole Diameter
0.531 inches
Width
0.031 inches
Overall Length
0.500 inches
Hole Or Slot Quantity
2
Recess Diameter
0.765 inches
Recess Depth
0.438 inches
Thread Size
0.890 in.-36
Depth
0.031 inches
End Application
Telescope mk90
Drive Type
Slotted
Drive Facility Angular Spacing In Deg
180.0
Guide Design
Thread relief
Guide Location
Edge opposite drive edge
Internal Annular Serration
Not provided
Setscrew Notch
Not provided
Hole Chamfer Angle In Deg
0.0
Hole Chamfer Diameter
0.531 inches
Material
Brass
Material
Copper alloy
Style Designator
Recessed
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
003821478
NSN
1240003821478

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
415268PC9
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 1240-00-382-1478
What are the manufacturers of nsn 1240003821478?
Does this nsn 1240003821478 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240003821478
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 1240003821478 contain any precious metals?
No precious metal content.
Does nsn 1240003821478 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240003821478?
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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