The Spacer,optical Element, cataloged under National Stock Number 6650-00-337-3597, 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 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-00-337-3597 |
| Item Name | Spacer,optical Element |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Status | ACTIVE |
| FSC Application Data | LENS SWITCHING ASSEMBLY,RECEIVER,VIEWER,INFRARED DETECTING GROUP,NIGHT VISION |
| Body Outside Diameter | 2.940 INCHES MAXIMUM IN |
| Style Designator | SPACER |
| Material Document and Classification | QQ-A-250-11,TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Straight Bore Inside Diameter | 2.850 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 708599-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6650-00-337-3597 is a Spacer,optical Element, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
Key specifications for 6650-00-337-3597: FSC Application Data: LENS SWITCHING ASSEMBLY,RECEIVER,VIEWER,INFRARED DETECTING GROUP,NIGHT VISION; Body Outside Diameter: 2.940 INCHES MAXIMUM IN; Style Designator: SPACER; Material Document and Classification: QQ-A-250-11,TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE. 6 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 6650-00-337-3597 has DEMIL Code B. 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.