# NSN 1240-00-864-2931: Window, Optical Instrument

NSN 1240-00-864-2931 (also written 1240008642931; NIIN 00-864-2931) is a window, optical instrument in Federal Supply Class 1240, Optical Sighting and Ranging Equipment. 1 manufacturer part number from 1 supplier is on record. It was last purchased in Sep 2026.

## Identification

- NSN: 1240-00-864-2931 (1240008642931)
- NIIN: 00-864-2931 (008642931)
- Item name: WINDOW,OPTICAL INSTRUMENT
- Federal Supply Class: [FSC 1240 Optical Sighting and Ranging Equipment](https://nsnexplorer.com/fsc/1240/)
- Federal Supply Group: [FSG 12](https://nsnexplorer.com/group/12/)
- Acquisition method suffix code: AMSC G: the government has a complete data package and the rights to use it. (observed 2026-10-27)
- Acquisition method code: 1

## Characteristics

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

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 7660439 | 19200 | COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-03 | [SPE7L326P3622](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=1240008642931) | WINDOW, OPTICAL INST | OPTEX SYSTEMS, INC | $7,406.10 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=1240008642931&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=1240008642931
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/1240-00-864-2931/
JSON: https://nsnexplorer.com/api/nsn/1240-00-864-2931.json