The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-068-2422, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-068-2422 |
| Primary Part Number | 12266932 |
| 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 | 0.030 INCHES NOMINAL IN |
| Thread Pitch Diameters | +3.4820 TO 3.4867 INCHES IN |
| Outside Diameter | 3.750 INCHES NOMINAL IN |
| Thread Location | INTERNAL |
| Aperture Diameter | 3.470 INCHES MINIMUM AND 3.477 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 3 1/2-36 |
| Screw Thread Series Designator | UNS |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1240-01-068-2422 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 1240-01-068-2422 has 2 manufacturer part numbers on file: 048132 (L3 Technologies, Inc. Div L3 Keo), 12266932 (U S Army Tank Automotive Command Amsta-Im-Mm).
2 possible matches (shared part number, not a government interchangeability claim): 4810-01-294-5604, 5915-01-523-9004. Verify interchangeability with system specifications before substitution.
Key specifications for 12266932: Internal Flange Thickness: 0.030 INCHES NOMINAL IN; Thread Pitch Diameters: +3.4820 TO 3.4867 INCHES IN; Outside Diameter: 3.750 INCHES NOMINAL IN; Thread Location: INTERNAL. 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.