The Cell,optical Element, cataloged under National Stock Number 1240-00-210-4381, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 12 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-210-4381 |
| Primary Part Number | 944628 |
| Item Name | Cell,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Overall Diameter | 1.949 INCHES NOMINAL IN |
| Eccentric Construction | NOT PROVIDED |
| Thread Pitch Diameters | +1.7790 TO 1.7922 INCHES IN |
| Thread Length | 0.200 INCHES IN |
| Thread Location | INTERNAL |
| Chamfer Location | DRIVE END |
| Thread Direction | RIGHT-HAND |
| Chamfer Size | 0.0.5 IN. BY 45 DEG IN |
| Thread Size | 1 13/16-32 |
| Screw Thread Series Designator | UNS |
| Thread Class | 3B |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1240-00-210-4381 is a Cell,optical Element, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-00-210-4381 has 2 manufacturer part numbers on file: 944628 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), TA3711 (L3 Technologies, Inc. Div L3 Keo).
1 possible match (shared part number, not a government interchangeability claim): 6625-00-240-7545. Verify interchangeability with system specifications before substitution.
Key specifications for 944628: Overall Diameter: 1.949 INCHES NOMINAL IN; Eccentric Construction: NOT PROVIDED; Thread Pitch Diameters: +1.7790 TO 1.7922 INCHES IN; Overall Length: 1.385 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 1240-00-210-4381 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.