The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-077-2885, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-077-2885 |
| Primary Part Number | 11780079 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Internal Flange Thickness | 0.362 INCHES NOMINAL IN |
| Thread Pitch Diameters | +3.7235 TO 3.7283 INCHES IN |
| Material Document and Classification | QQ-A-250/12, T651 FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 3.740 INCHES MINIMUM AND 3.760 INCHES MAXIMUM IN |
| Thread Length | 0.125 INCHES IN |
| Thread Location | EXTERNAL |
| Aperture Diameter | 3.383 INCHES MINIMUM AND 3.393 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 3/8-32 |
| Screw Thread Series Designator | UNS |
| Mounting Configuration | 0.081 IN.DIA.12 HOLES EQUALLY SPACED IN |
| Thread Class | 2A A |
| Material | ALUMINUM ALLOY 7075 |
| 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 |
|---|---|
| 11780079 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| 42473-1 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Rc Displays Systems |
NSN 1240-01-077-2885 is a Ring,retaining,optical Element, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-077-2885 has 1 manufacturer part number on file: 11780079 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 11780079: Internal Flange Thickness: 0.362 INCHES NOMINAL IN; Thread Pitch Diameters: +3.7235 TO 3.7283 INCHES IN; Material Document and Classification: QQ-A-250/12, T651 FED SPEC SINGLE MATERIAL RESPONSE; Outside Diameter: 3.740 INCHES MINIMUM AND 3.760 INCHES MAXIMUM IN. 13 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.