The Window,optical Instrument, cataloged under National Stock Number 6650-01-445-8790, 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 Technical Wire Products, Llc Dba Twp. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6650-01-445-8790 |
| Primary Part Number | 71-01588 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Technical Wire Products, Llc Dba Twp |
| Status | ACTIVE |
| Length | 3.800 INCHES NOMINAL IN |
| Polished Periphery | NOT PROVIDED |
| Width | 1.330 INCHES NOMINAL IN |
| Material | PLASTIC AND STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Thickness | 0.130 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 71-01588 PRIMARY | Technical Wire Products, Llc Dba Twp (USA) |
| Reference | Meaning |
|---|---|
| L317 000 184 | 7/1 Vendor item drawing reference Lockheed Martin Librascope Corporation |
NSN 6650-01-445-8790 is a Window,optical Instrument, manufactured by Technical Wire Products, Llc Dba Twp, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-01-445-8790 has 1 manufacturer part number on file: 71-01588 (Technical Wire Products, Llc Dba Twp).
Key specifications for 71-01588: Length: 3.800 INCHES NOMINAL IN; Polished Periphery: NOT PROVIDED; Special Features: LIGHT TRANS.- 50 PCT AT 643 NANOMETERS; EMI SHIELDED, ATTENUATION- 60DB MIN. UP TO 10 HMZ. DB; Width: 1.330 INCHES NOMINAL IN. 5 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 6650-01-445-8790 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.