The Cell,optical Element, cataloged under National Stock Number 1240-00-989-3555, 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 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-989-3555 |
| Primary Part Number | 8619883 |
| 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 | PERISCOPE,XM36 |
| Overall Diameter | 1.815 INCHES NOMINAL IN |
| Eccentric Construction | NOT PROVIDED |
| Thread Length | 0.250 INCHES AND 0.086 INCHES IN |
| Thread Location | INTERNAL |
| Chamfer Location | LARGER DIAMETER END |
| Chamfer Size | 0.038 IN. BY 30 DEG IN |
| Thread Size | 1-23/32 - 32 AND 1-21/32 - 32 |
| Screw Thread Series Designator | UNS |
| Thread Class | 3A AND 2B A |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1240-00-989-3555 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 1240-00-989-3555 has 2 manufacturer part numbers on file: 8619883 (Seiler Instrument and Manufacturing Company, Incorporated), 8619883 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 8619883: FSC Application Data: PERISCOPE,XM36; Overall Diameter: 1.815 INCHES NOMINAL IN; Eccentric Construction: NOT PROVIDED; Overall Length: 1.884 INCHES NOMINAL IN. 11 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 1240-00-989-3555 has DEMIL Code Q. 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.