The Cell,optical Element, cataloged under National Stock Number 1240-00-157-9673, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-157-9673 |
| Primary Part Number | 481294-4 |
| 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 |
| Element Securing Method | INTERNAL THREAD |
| Cell Eccentricity From Geometric Axis | 0.001 INCHES IN |
| Overall Diameter | 1.995 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN |
| Drive Type | DRILLED HOLE ON PERIPHERY |
| Eccentric Construction | NOT PROVIDED |
| Thread Length | 0.697 INCHES AND 0.594 INCHES IN |
| Thread Location | EXTERNAL AND INTERNAL |
| Chamfer Location | BOTH ENDS |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1 3/4-32 AND 1 1/2-32 |
| Screw Thread Series Designator | UNS |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1240-00-157-9673 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 1240-00-157-9673 has 2 manufacturer part numbers on file: 481294-4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 232727 (Lockheed Martin Corporation Div Rms - Mitchel Field).
Key specifications for 481294-4: Element Securing Method: INTERNAL THREAD; Cell Eccentricity From Geometric Axis: 0.001 INCHES IN; Overall Diameter: 1.995 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN; Drive Type: DRILLED HOLE ON PERIPHERY. 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 1240-00-157-9673 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.