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Optical Element Retainer NSN 1240-00-420-9123

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 1240-00-420-9123 NSN: 1240-00-420-9123

Features and Characteristics

Shoulder Length
Between 0.313 inches and 0.344 inches
Tapered Hole Minor Diameter
Between 1.000 inches and 1.005 inches
Taper Angle In Deg
10.5
Width
Between 0.060 inches and 0.070 inches
Overall Length
Between 0.422 inches and 0.438 inches
Flange Diameter
Between 1.328 inches and 1.344 inches
Hole Or Slot Quantity
2
Depth
Between 0.060 inches and 0.070 inches
Drive Type
Slotted
Drive Facility Angular Spacing In Deg
180.0
Internal Annular Serration
Not provided
Setscrew Notch
Not provided
Shoulder Thread Size
1.188 in.-32uns-2a
Special Features
Groove adjacent to shoulder thread, 0.047 in. W, 0.047 in. Deep.
Material
Plastic, mil-m-14, type mfe
Material
Plastic phenolic and silica
Material Specification
Mil-m-14, type mfe military specification single material response
Style Designator
Shouldered
Fsc Application Data
Periscope, tank m32, m32c, m35, m36
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
004209123
NSN
1240004209123

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
10541928
Cage Code:
19200
Status:
A
MSDS:
Part Number:
1240004209123
Cage Code:
SCY13
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 1240-00-420-9123
What are the manufacturers of nsn 1240004209123?
Does this nsn 1240004209123 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240004209123
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 1240004209123 contain any precious metals?
Precious metal content is unknown.
Does nsn 1240004209123 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240004209123?
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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