The Lens,optical Instrument, cataloged under National Stock Number 6650-01-040-3958, is classified within Federal Supply Class 6650 (Optical Instruments, Test Equipment, Components and Accessories) of the Instruments and Laboratory Equipment group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-01-040-3958 |
| Item Name | Lens,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Status | ACTIVE |
| Length | 0.300 INCHES NOMINAL IN |
| Back Focal Length | 8.753 INCHES IN |
| Front Focal Length | 3.968 INCHES IN |
| Diameter | 2.750 INCHES MINIMUM IN |
| Axial Thickness | 0.300 INCHES NOMINAL IN |
| Material | GLASS OPTICAL |
| Single Lens Style | MENISCUS CONVERGING |
| 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 |
| Reference | Meaning |
|---|---|
| SM-D-774389-1 | 3/2 Design control — primary reference U.S. Government activity |
| SM-D-774389 | 5/2 Secondary reference U.S. Government activity |
NSN 6650-01-040-3958 is a Lens,optical Instrument, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
Key specifications for 6650-01-040-3958: Length: 0.300 INCHES NOMINAL IN; Back Focal Length: 8.753 INCHES IN; Front Focal Length: 3.968 INCHES IN; Diameter: 2.750 INCHES MINIMUM IN. 7 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 6650-01-040-3958 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.