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Optical Instrument Window NSN 1240-00-864-2931

Item Description

A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.

NSN 1240-00-864-2931 NSN: 1240-00-864-2931

  Stock Availability

NSN 1240008642931 availability
(as of 02/24/2022).

  • NE: 1

Note: Availability of this item may have changed since it was last checked. Request a quote for an updated price and availability quote.

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  •   7 Year Record Retention
  •   On Time Delivery
  •   HAZMAT Certified
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Features and Characteristics

Width
Between 0.990 inches and 1.000 inches
Thickness
Between 0.190 inches and 0.200 inches
Length
Between 1.557 inches and 1.562 inches
Bevel Depth
Between 0.020 inches and 0.030 inches
Refraction Index
1.5170
Polished Surface
Both
Dispersion
64.5 angstroms
Reflection Reducing Surface
Both
Polished Periphery
Not provided
Bevel Angle In Deg
Between 42.000 and 48.000
Special Features
All corners with a 0.310 in. Radius
Material
Glass, optical, mil-g-174, class 1, grade c, type 517-645
Material
Glass, optical, mil-g-174, class 1, grade c, type 517-645
Fsc Application Data
Telescope, panoramic
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
008642931
NSN
1240008642931

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
7660439
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 1240-00-864-2931
What are the manufacturers of nsn 1240008642931?
Does this nsn 1240008642931 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240008642931
A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. this item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Does nsn 1240008642931 contain any precious metals?
No precious metal content.
Does nsn 1240008642931 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240008642931?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
10908
FIIG:
T271-F
App. Key:
FA
Cond. Code:
2
Status:
A

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