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Optical Element Retainer NSN 1240-00-315-0018

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 1240-00-315-0018 NSN: 1240-00-315-0018

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Features and Characteristics

Shoulder Length
0.500 inches
Hole Diameter
Between 2.490 inches and 2.510 inches
Width
0.120 inches
Overall Length
Between 1.050 inches and 1.070 inches
Hole Or Slot Quantity
2
Depth
0.120 inches
Drive Type
Slotted
Drive Facility Angular Spacing In Deg
180.0
Internal Annular Serration
Not provided
Setscrew Notch
Not provided
Flange Thread Size
3.125 in.-32 ns-3
Shoulder Thread Size
2.875 in.-32 ns-3
Material
Brass, qq-b-613, comp 11, 1/2h
Material
Copper alloy 260 or copper alloy 262 or copper alloy 268 or copper alloy 270 or copper alloy 272 or copper alloy 274 or copper alloy 280 or copper alloy 330 or copper alloy 331 or copper alloy 332 or copper alloy 335 or copper alloy 340 or copper alloy 342 or copper alloy 344 or copper alloy 345 or copper alloy 347 or copper alloy 348 or copper alloy 350 or copper alloy 353 or copper alloy 356 or copper alloy 360 or copper alloy 370
Material Specification
Qq-b-613, comp 11, 1/2h federal specification single material response
Surface Treatment
Nickel
Style Designator
Shouldered
Surface Treatment
Black nickel plate
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
003150018
NSN
1240003150018

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
279510PC2
Cage Code:
10001
Status:
A
MSDS:
Part Number:
BP13863
Cage Code:
27361
Status:
A
MSDS:
Part Number:
279510
Cage Code:
78039
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 1240-00-315-0018
What are the manufacturers of nsn 1240003150018?
Does this nsn 1240003150018 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240003150018
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 1240003150018 contain any precious metals?
No precious metal content.
Does nsn 1240003150018 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240003150018?
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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