The Window,optical Instrument, cataloged under National Stock Number 1240-01-079-2960, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-079-2960 |
| Primary Part Number | 12279236 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Length | 83.500 MILLIMETERS NOMINAL MM |
| Supplementary Features | SURFACE TOLERANCES FOR POWER AND IRREGULARITY APPLY OVER AN 26MM DIAMETER WITHIN THE CLEAR APERTURE; MAXIMUM ALLOWABLE TRANSMITTED WAVEFRONT ERROR FOR ANY 26MM DIAMETER WITHIN THE CLEAR APERTURE IS 1/2 WAVE (FREQUENCY = 633NM) MM |
| Specification/standard Data | 96906-MIL-PRF-13830 GOVERNMENT STANDARD |
| Width | 5.00 MILLIMETERS NOMINAL MM |
| Material | GLASS OPTICAL OVERALL |
| Thickness | 32.00 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12279236 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12279236 | 5/9 Secondary reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 1240-01-079-2960 is a Window,optical Instrument, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-079-2960 has 1 manufacturer part number on file: 12279236 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12279236: Length: 83.500 MILLIMETERS NOMINAL MM; Supplementary Features: SURFACE TOLERANCES FOR POWER AND IRREGULARITY APPLY OVER AN 26MM DIAMETER WITHIN THE CLEAR APERTURE; MAXIMUM ALLOWABLE TRANSMITTED WAVEFRONT ERROR FOR ANY 26MM DIAMETER WITHIN THE CLEAR APERTURE IS 1/2 WAVE (FREQUENCY = 633NM) MM; Specification/standard Data: 96906-MIL-PRF-13830 GOVERNMENT STANDARD; Special Features: PER SPECIFICATION MIL-G-174, GR B; TYPE: K5 OR EQUIVALENT; ND: 1.522; VD: 59.5; CTRG ERROR: 1 MINUTE; SURFACE TOLERANCES: SCRATCH = 80, DIG = 50. 6 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 1240-01-079-2960 has DEMIL Code D. 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.