The Retainer,optical Element, cataloged under National Stock Number 1240-01-082-3530, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-082-3530 |
| Primary Part Number | 12266751 |
| Item Name | Retainer,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Flange Diameter | 3.070 INCHES MAXIMUM IN |
| Shoulder Length | 0.431 INCHES MAXIMUM IN |
| Shoulder Diameter | 2.555 INCHES MAXIMUM IN |
| Style Designator | SHOULDERED |
| Setscrew Notch | PROVIDED |
| Guide Design | THREAD CHAMFER |
| Internal Annular Serration | NOT PROVIDED |
| Material | ALUMINUM ALLOY 6061 |
| Hole Diameter | 2.405 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12266751 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 12266751 | Bright Lights Usa, Inc Dba Blusa Defense Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 12266751 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
| 12266751 | 5/9 Secondary reference Drs Network & Imaging Systems Llc |
| 12266751 | 5/2 Secondary reference U.S. Government activity |
NSN 1240-01-082-3530 is a Retainer,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 1240-01-082-3530 has 2 manufacturer part numbers on file: 12266751 (U S Army Tank Automotive Command Amsta-Im-Mm), 12266751 (Bright Lights Usa, Inc Dba Blusa Defense Manufacturing).
Key specifications for 12266751: Flange Diameter: 3.070 INCHES MAXIMUM IN; Shoulder Length: 0.431 INCHES MAXIMUM IN; Shoulder Diameter: 2.555 INCHES MAXIMUM IN; Style Designator: SHOULDERED. 9 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.
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.