Optical Instrument Window

(NSN) National Stock Number
1240-01-218-7328
Federal Supply Classification
1240 Optical Sighting and Ranging Equipment
Item Name Code
10908
Schedule B Code
9803200000
Summary

6.805 inches nominal width, 0.510 inches nominal thickness, 7.290 inches nominal length, 25.300 cubic inches cubic measure, both polished surface, not provided polished periphery

DAC HCC DMIL RNCC
1 - - 3
RNVC SADC MSDS RNAAC
2 - - BF
Identification

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.

INC FIIG Concept Condition
10908 T271-F - 2
Specifications
Width
6.805 inches nominal
Details A measurement taken at right angles to the length of an item,in distinction from thickness.
Thickness
0.510 inches nominal
Details A measurement of the smallest dimension of an item,in distinction from length or width.
Length
7.290 inches nominal
Details A measurement of the longest dimension of any object,in distinction from width.
Cubic Measure
25.300 cubic inches
Details A measurement of volume taken by multiplying the length by the width by the height of an item and rendered in cubic units.
Polished Surface
both
Details An indication of the polished surface/s/ on the item.
Polished Periphery
not provided
Details An indication of whether or not a polished periphery is provided.
Bevel Angle In Deg
44.500 nominal
Details The angle of the bevel,expressed in degrees.
Material
germanium
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
1240012187328 A00AM 9 - 6 9 - YP
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
Y A A -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
33120 - W -
RVC WCC TCC SHC
- 652 4 9
Price and Availability Quote

Send us a quick request for quote using the form below:

Provided with every order

Order with confidence, we are a valued certified supplier serving customers in the military and aerospace industries.

  • Counterfeit Parts Prevention
  • 100% Product Inspections
  • 7 Year Record Retention
  • On Time Delivery
  • HAZMAT Certified
  • Worldwide Shipping
FAQs
Frequently asked questions for NSN 1240-01-218-7328
What is the NIIN of the NSN 1240-01-218-7328?
The National Item Identification Number (NIIN) of the NSN 1240-01-218-7328 is 01-218-7328
When the NSN 1240-01-218-7328 was assigned to the Federal Catalog?
It was assigned 39 years ago, on Thu, Oct 17, 1985
Does the NSN 1240-01-218-7328 contain any precious metals?
Does not contain precious metal
Does the NSN 1240-01-218-7328 contain any hazardous material?
In HMIRS
What is the ESD classification of NSN 1240-01-218-7328?
No known electrostatic discharge

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.

Similar Products
Who we are?

At our core, we specialize in sourcing and supplying high-quality NSN (National Stock Number) parts to industries that demand precision and reliability.

From aerospace and defense to manufacturing and logistics, we provide the essential components that keep critical systems running.

Contact
350 Tenth Ave
San Diego, CA, 92101
United States
© 2025 National Stock Number (NSN) Parts Store, Inc. All rights reserved.
Made in USA