The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-072-6395, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-072-6395 |
| Primary Part Number | 12266675 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Internal Flange Thickness | 0.600 INCHES NOMINAL IN |
| Material Document and Classification | ALLOY 356-T6 ASSN STD 1ST MATERIAL RESPONSE OR ALLOY 2024-T3 ASSN STD 2ND MATERIAL RESPONSE OR ALLOY 6061-T6 ASSN STD 3RD MATERIAL RESPONSE |
| Outside Diameter | 5.450 INCHES NOMINAL IN |
| Aperture Diameter | 2.400 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 356.0 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 6061 |
| 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 |
|---|---|
| 12266675 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 6695-581 | 5/9 Secondary reference Recon/optical, Inc. |
NSN 1240-01-072-6395 is a Ring,retaining,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 1240-01-072-6395 has 1 manufacturer part number on file: 12266675 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266675: Internal Flange Thickness: 0.600 INCHES NOMINAL IN; Material Document and Classification: ALLOY 356-T6 ASSN STD 1ST MATERIAL RESPONSE OR ALLOY 2024-T3 ASSN STD 2ND MATERIAL RESPONSE OR ALLOY 6061-T6 ASSN STD 3RD MATERIAL RESPONSE; Outside Diameter: 5.450 INCHES NOMINAL IN; Aperture Diameter: 2.400 INCHES NOMINAL IN. 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 1240-01-072-6395 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.