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Optical Element Retaining Ring NSN 1240-00-210-4395

Item Description

A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see retainer, optical element. Excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.

NSN 1240-00-210-4395 NSN: 1240-00-210-4395

Features and Characteristics

Thread Direction
Right-hand
Thread Length
0.495 inches
Overall Length
Between 0.759 inches and 0.765 inches
Outside Diameter
Between 1.828 inches and 1.829 inches
Aperture Diameter
Between 1.451 inches and 1.457 inches
End Application
Telescope
Mounting Configuration
Three 0.063 in. Diameter lock screws
Thread Location
Internal
Internal Flange Thickness
Between 0.020 inches and 0.040 inches
Knurled Periphery
Not provided
Material
Aluminum alloy
Material
Aluminum alloy
Surface Treatment
Anodized black
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
002104395
NSN
1240002104395

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
789PC3
Cage Code:
78039
Status:
A
MSDS:
Part Number:
1390117
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 1240-00-210-4395
What are the manufacturers of nsn 1240002104395?
Does this nsn 1240002104395 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240002104395
A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. it may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. for externally threaded items, see retainer, optical element. excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.
Does nsn 1240002104395 contain any precious metals?
No precious metal content.
Does nsn 1240002104395 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240002104395?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
22585
FIIG:
T271-J
App. Key:
JC
Cond. Code:
2
Status:
A

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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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