The Lens,optical Instrument, cataloged under National Stock Number 6650-00-618-9398, 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 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-00-618-9398 |
| Item Name | Lens,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Status | ACTIVE |
| FSC Application Data | RANGE FINDER,FIRE CONTROL |
| Individual Lens Style | DOUBLE CONVEX AND DOUBLE CONCAVE |
| Back Focal Length | 7.580 INCHES IN |
| Front Focal Length | 9.109 INCHES IN |
| Equivalent Focal Length | 8.476 INCHES IN |
| Material Document and Classification | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| Diameter | 1.298 INCHES MINIMUM AND 1.299 INCHES MAXIMUM IN |
| Abbe Constant | 64.500 AND 29.300 |
| Axial Thickness | 0.417 INCHES NOMINAL AND 0.091 INCHES NOMINAL IN |
| Compound Lens Edge Thickness | 0.395 INCHES NOMINAL IN |
| Material | GLASS OPTICAL |
| Refraction Index | 1.5171 NOMINAL AND 1.7200 NOMINAL |
| Compound Lens Style | DOUBLET |
| Compound Lens Overall Axial Thickness | 0.508 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1073970PC1 | 5/9 Secondary reference F and H Mfg Corp |
| 1073970PC1 | 5/9 Secondary reference Grayco Optical Corp |
| 1073970PC1 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 6650-00-618-9398 is a Lens,optical Instrument, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
Key specifications for 6650-00-618-9398: FSC Application Data: RANGE FINDER,FIRE CONTROL; Individual Lens Style: DOUBLE CONVEX AND DOUBLE CONCAVE; Back Focal Length: 7.580 INCHES IN; Front Focal Length: 9.109 INCHES IN. 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 6650-00-618-9398 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.