The Cell,optical Element, cataloged under National Stock Number 1240-00-346-8155, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-346-8155 |
| Primary Part Number | 8211657 |
| Item Name | Cell,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 |
| FSC Application Data | OPTICAL SIGHTING AND RANGING EQUIPMENT,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| Element Securing Method | THREADED RING |
| Overall Diameter | 0.937 INCHES NOMINAL IN |
| Drive Type | SLOTTED FACE |
| Eccentric Construction | NOT PROVIDED |
| Thread Length | 0.078 INCHES AND 0.234 INCHES IN |
| Thread Location | INTERNAL AND EXTERNAL |
| Chamfer Location | OPPOSITE DRIVE END |
| Thread Size | 0.812 IN. -32 AND 0.937 IN. -32 IN |
| Screw Thread Series Designator | UNS |
| Thread Class | 2B AND 2A A |
| Material | ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| 8211657 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| 8211657 | 5/1 Secondary reference Seiler Instrument and Manufacturing Company, Incorporated |
NSN 1240-00-346-8155 is a Cell,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 1240-00-346-8155 has 1 manufacturer part number on file: 8211657 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 8211657: Overall Height: 0.410 INCHES NOMINAL IN; FSC Application Data: OPTICAL SIGHTING AND RANGING EQUIPMENT,INTEGRATED WITH FIRE CONTROL EQUIPMENT; Element Securing Method: THREADED RING; Overall Diameter: 0.937 INCHES NOMINAL 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 1240-00-346-8155 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.