The Cloth,lens, cataloged under National Stock Number 6640-01-648-0644, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. The manufacturer of record is Thales Sa. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6640-01-648-0644 |
| Primary Part Number | 91950989 |
| Item Name | Cloth,lens |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Manufacturer | Thales Sa |
| Status | ACTIVE |
| Features Provided | REUSABLE AND ABSORBENT |
| Material | PLASTIC POLYAMIDE NYLON |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 91950989 | Thales Sa (FRA) |
| Reference | Meaning |
|---|---|
| 54-718 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6640-01-648-0644 is a Cloth,lens, manufactured by Thales Sa, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
NSN 6640-01-648-0644 has 1 manufacturer part number on file: 91950989 (Thales Sa).
1 possible match (shared part number, not a government interchangeability claim): 1630-01-650-1043. Verify interchangeability with system specifications before substitution.
Key specifications for 91950989: Overall Height: 15.000 INCHES NOMINAL IN; Overall Length: 12.000 INCHES NOMINAL IN; Features Provided: REUSABLE AND ABSORBENT; Special Features: TIGHTLY WOVEN POLY/NYLON MICROFIBERS MAKE THESE EXTREMELY DURABLE CLEANING CLOTHS; THE MICROFIBERS EFFECTIVELY CUT THROUGH DIRT AND LIFT OIL AND MOISTURE FROM THE LENS SURFACE; ORANGE, ANTI-STATIC MICRO-FIBER CLOTH HAS STRIPES OF EFFECTIVE CONDUCTIVE FIBERS KNIT EVERY 1/8 INCH THAT DISSIPATE OR DRAIN OFF STATIC CHARGES; HUNDREDS OF THOUSANDS OF SMALL POCKETS IN THE CLOTH AGGRESSIVELY CAPTURE THE DUST AND DIRT; THE THICK, SOFT CLOTHS ARE COMPLETELY NON-ABRASIVE IN. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.