The Window,optical Instrument, cataloged under National Stock Number 6650-01-209-2409, is classified within Federal Supply Class 6650 (Optical Instruments, Test Equipment, Components and Accessories) of the Instruments and Laboratory Equipment group. The manufacturer of record is Coherent Aerospace & Defense, Inc.. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-01-209-2409 |
| Primary Part Number | 13084364 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Coherent Aerospace & Defense, Inc. |
| Status | ACTIVE |
| Length | 2.250 INCHES NOMINAL IN |
| Surface Finish | POLISHED |
| Material Document and Classification | QQ-A-250/11, T6 FED SPEC 1ST MATERIAL RESPONSE OR MIL-G-174 MIL SPEC 2ND MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Polished Periphery | PROVIDED |
| Width | 2.250 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 AND GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Refraction Index | 1.5075 MINIMUM AND 1.5095 MAXIMUM |
| Polished Surface | BOTH |
| Dispersion | 61.2 ANGSTROMS NOMINAL |
| Thickness | 0.370 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 13084364 PRIMARY | Coherent Aerospace & Defense, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13084364 | 5/9 Secondary reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
| 13084364 | 7/2 Vendor item drawing reference Lockheed Martin Corporation |
| 1505000 | 5/9 Secondary reference Alpha Optical Systems Inc |
NSN 6650-01-209-2409 is a Window,optical Instrument, manufactured by Coherent Aerospace & Defense, Inc., classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-01-209-2409 has 1 manufacturer part number on file: 13084364 (Coherent Aerospace & Defense, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-627-4593. Verify interchangeability with system specifications before substitution.
Key specifications for 13084364: Length: 2.250 INCHES NOMINAL IN; Surface Finish: POLISHED; Material Document and Classification: QQ-A-250/11, T6 FED SPEC 1ST MATERIAL RESPONSE OR MIL-G-174 MIL SPEC 2ND MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Polished Periphery: PROVIDED. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6650-01-209-2409 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.