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NSN 1240-00-864-2931, 1240008642931
WINDOW,OPTICAL INSTRUMENT

Federal Supply Classification
FSC 1240 - Optical Sighting and Ranging Equipment
National Item Identification Number
NIIN 008642931
Codification Country
United States
Item Name Code
INC 10908
Criticality
(X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code
(N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.
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DLMS® Summary

National Stock Number 1240-00-864-2931

National Stock Number (NSN) 1240-00-864-2931, or NIIN 008642931, (window,optical instrument) was assigned January 1, 1962 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN.

This part number has been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 6 contracts issued for this part number, with 6 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 4 different suppliers. The last contract numbers awarded were: SPE7M123P7937, SPE7M123P7937, SPE7M219P1021, SPE7M515M8933, SPM7M111V6540. The total value of the awarded contracts has been US$ 54,572.95.

This NSN is unique to one weapons system.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 03, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.

This NSN is assigned to Item Name Code (INC) 10908. [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.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1240008642931 does not contain precious metals.

This NSN is associated to Schedule B 9803200000: military equipments not identified by kind. The Schedule B End Use is listed as military apparel and footwear.

This information was last updated on .


Technical Characteristics

DISPERSION
(BMSH) 64.5 ANGSTROMS NOMINAL
BEVEL ANGLE IN DEG
(BMSP) 42.000 MINIMUM AND 48.000 MAXIMUM
BEVEL DEPTH
(AJEF) 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM
FSC APPLICATION DATA
(ZZZV) TELESCOPE,PANORAMIC
LENGTH
(ABRY) 1.557 INCHES MINIMUM AND 1.562 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) MIL-G-174, CLASS 1, GRADE C, TYPE 517-645 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIAL
(MATT) GLASS OPTICAL
POLISHED PERIPHERY
(BMSM) NOT PROVIDED
POLISHED SURFACE
(BMSG) BOTH
REFLECTION REDUCING SURFACE
(BMSK) BOTH
REFRACTION INDEX
(BMMX) 1.5170 NOMINAL
SPECIAL FEATURES
(FEAT) ALL CORNERS WITH A 0.310 IN. RADIUS
THICKNESS
(ABNM) 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM
WIDTH
(ABGL) 0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM
UNABLE TO DECODE
(MATL) UNABLE TO DECODE
III FSC APPLICATION DATA
(ZZZV) TELESCOPE,PANORAMIC
III MATERIAL
(MATL) GLASS, OPTICAL, MIL-G-174, CLASS 1, GRADE C, TYPE 517-645
MATERIAL
(MATT) GLASS, OPTICAL, MIL-G-174, CLASS 1, GRADE C, TYPE 517-645
MATERIAL
(MATL) GLASS, OPTICAL, MIL-G-174, CLASS 1, GRADE C, TYPE 517-645
III MATERIAL
(MATT) GLASS, OPTICAL, MIL-G-174, CLASS 1, GRADE C, TYPE 517-645

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