The Cell,optical Element, cataloged under National Stock Number 1240-01-084-2739, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1240-01-084-2739 |
| Primary Part Number | 12266903 |
| Item Name | Cell,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Drive Type | KNURL |
| Eccentric Construction | NOT PROVIDED |
| Thread Pitch Diameters | +2.0335 TO 2.0414 INCHES AND +1.8547 TO 1.8600 INCHES IN |
| Thread Length | 1.040 INCHES AND 0.360 INCHES IN |
| Thread Location | EXTERNAL AND INTERNAL |
| Chamfer Location | BOTH ENDS |
| Thread Direction | RIGHT-HAND |
| Chamfer Size | 0.030 IN. BY 45 DEG;0.060 IN. BY 45 DEG IN |
| Screw Thread Series Designator | SPECIAL AND UNS |
| Thread Class | 2A AND 2B A |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 12266903 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 048103 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
| 957F048103 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 1240-01-084-2739 is a Cell,optical Element, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-084-2739 has 1 manufacturer part number on file: 12266903 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 6550-01-608-0637. Verify interchangeability with system specifications before substitution.
Key specifications for 12266903: Overall Diameter: 3.000 INCHES NOMINAL IN; Drive Type: KNURL; Eccentric Construction: NOT PROVIDED; Thread Pitch Diameters: +2.0335 TO 2.0414 INCHES AND +1.8547 TO 1.8600 INCHES IN. 12 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 1240-01-084-2739 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.