The Lens,optical Instrument, cataloged under National Stock Number 6650-00-692-1540, is classified within Federal Supply Class 6650 (Optical Instruments, Test Equipment, Components and Accessories) of the Instruments and Laboratory Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-00-692-1540 |
| Primary Part Number | 8270617 |
| Item Name | Lens,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| FSC Application Data | SIGHT PERISCOPE M28,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| Individual Lens Style | DOUBLE CONVEX AND DOUBLE CONCAVE |
| Back Focal Length | 3.169 INCHES IN |
| Element Left Surface Radius | 1.488 INCHES IN |
| Equivalent Focal Length | 3.729 INCHES IN |
| Element Right Surface Radius | 1.366 INCHES IN |
| Material Document and Classification | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| Diameter | 1.575 INCHES NOMINAL IN |
| Abbe Constant | 55.500 AND 33.800 |
| Axial Thickness | 0.484 INCHES NOMINAL AND 0.092 INCHES NOMINAL IN |
| Compound Lens Edge Thickness | 0.436 INCHES NOMINAL IN |
| Material | GLASS OPTICAL |
| Refraction Index | 1.6380 NOMINAL AND 1.6490 NOMINAL |
| Compound Lens Style | DOUBLET |
| Compound Lens Overall Axial Thickness | 0.576 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8270617 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| 1240006921540 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 6650-00-692-1540 is a Lens,optical Instrument, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-00-692-1540 has 1 manufacturer part number on file: 8270617 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 8270617: FSC Application Data: SIGHT PERISCOPE M28,INTEGRATED WITH FIRE CONTROL EQUIPMENT; Individual Lens Style: DOUBLE CONVEX AND DOUBLE CONCAVE; Back Focal Length: 3.169 INCHES IN; Element Left Surface Radius: 1.488 INCHES IN. 15 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.
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.