The Cell,optical Element, cataloged under National Stock Number 1240-00-210-4393, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Leica Inc Surveying and Photogrammetry Systems Div. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-210-4393 |
| Primary Part Number | 789PC2 |
| Item Name | Cell,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Leica Inc Surveying and Photogrammetry Systems Div |
| Status | ACTIVE |
| Element Securing Method | EXTERNAL THREAD |
| Cell Eccentricity From Geometric Axis | 0.001 INCHES IN |
| Overall Diameter | 2.250 INCHES NOMINAL IN |
| Drive Type | DRILLED HOLE |
| Eccentric Construction | PROVIDED |
| Thread Pitch Diameters | +1.8547 TO 1.8600 INCHES AND +2.0679 TO 2.0721 INCHES IN |
| Thread Length | 0.300 INCHES AND 0.376 INCHES IN |
| Thread Location | INTERNAL AND EXTERNAL |
| Chamfer Location | THREADED END |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1 7/8-32 AND 2 5/64-32 |
| Screw Thread Series Designator | UNS |
| Thread Class | 2B AND 2A A |
| 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 1240-00-210-4393 is a Cell,optical Element, manufactured by Leica Inc Surveying and Photogrammetry Systems Div, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-00-210-4393 has 3 manufacturer part numbers on file: 789PC2 (Leica Inc Surveying and Photogrammetry Systems Div), 789PC2 (American Optical Co), 1262789 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 789PC2: Element Securing Method: EXTERNAL THREAD; Cell Eccentricity From Geometric Axis: 0.001 INCHES IN; Overall Diameter: 2.250 INCHES NOMINAL IN; Drive Type: DRILLED HOLE. 14 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 1240-00-210-4393 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.