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Optical Element Retainer NSN 1240-00-291-3570

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 1240-00-291-3570 NSN: 1240-00-291-3570

Features and Characteristics

Hole Diameter
Between 0.370 inches and 0.380 inches
Width
Between 0.052 inches and 0.072 inches
Overall Length
Between 0.180 inches and 0.190 inches
Hole Or Slot Quantity
2
Recess Diameter
Between 0.490 inches and 0.510 inches
Recess Depth
Between 0.150 inches and 0.180 inches
Thread Size
0.648 in.-48ns-3a
Counterbore Taper Angle In Deg
60.0
Depth
Between 0.050 inches and 0.060 inches
Drive Type
Slotted
Internal Annular Serration
Not provided
Setscrew Notch
Provided
Material
Aluminum alloy, qq-a-354, cond t-canceled
Material
Aluminum alloy 2024
Material Specification
Qq-a-354, cond t-canceled federal specification single material response
Surface Treatment
Anodize or anodize
Style Designator
Recessed
Surface Treatment
Anodized, mil-a-8625, type 1, class 2 or anodized, mil-a-8625, type 2, class 2
Fsc Application Data
Telescope, straight m86f
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
002913570
NSN
1240002913570

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
7583446
Cage Code:
19200
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 1240-00-291-3570
What are the manufacturers of nsn 1240002913570?
Does this nsn 1240002913570 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240002913570
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 1240002913570 contain any precious metals?
No precious metal content.
Does nsn 1240002913570 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240002913570?
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
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