The Lens,optical Instrument, cataloged under National Stock Number 6650-01-271-8239, 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 J M L Optical Industries, Inc. Dba J M L Direct Optics Div Jml Optical Industries Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-01-271-8239 |
| Primary Part Number | SM-D-850293 |
| Item Name | Lens,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | J M L Optical Industries, Inc. Dba J M L Direct Optics Div Jml Optical Industries Llc |
| Status | ACTIVE |
| Length | 0.418 INCHES NOMINAL IN |
| Element Left Surface Radius | 4.932 INCHES IN |
| Element Right Surface Radius | 11.110 INCHES IN |
| Material Document and Classification | MIL-G-174, GRADE A, TYPE 517-642 MIL SPEC SINGLE MATERIAL RESPONSE |
| Diameter | 3.133 INCHES MINIMUM AND 3.137 INCHES MAXIMUM IN |
| Axial Thickness | 0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Material | GLASS OPTICAL |
| Single Lens Style | MENISCUS DIVERGING |
| 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 |
| Part Number | Manufacturer |
|---|---|
| SM-D-850293 | J M L Optical Industries, Inc. Dba J M L Direct Optics Div Jml Optical Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| SM-D-850293 | 3/2 Design control — primary reference U.S. Government activity |
| SM-D-850293 | 5/9 Secondary reference Fjw Optical Systems, Inc Dba Fjw Optical Systems Inc |
NSN 6650-01-271-8239 is a Lens,optical Instrument, manufactured by J M L Optical Industries, Inc. Dba J M L Direct Optics Div Jml Optical Industries Llc, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-01-271-8239 has 1 manufacturer part number on file: SM-D-850293 (J M L Optical Industries, Inc. Dba J M L Direct Optics Div Jml Optical Industries Llc).
Key specifications for SM-D-850293: Length: 0.418 INCHES NOMINAL IN; Element Left Surface Radius: 4.932 INCHES IN; Element Right Surface Radius: 11.110 INCHES IN; Material Document and Classification: MIL-G-174, GRADE A, TYPE 517-642 MIL SPEC SINGLE MATERIAL RESPONSE. 8 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 6650-01-271-8239 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.