The Bottle,stopper, cataloged under National Stock Number 6640-00-702-2540, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. The manufacturer of record is Dumbo Defense Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6640-00-702-2540 |
| Primary Part Number | 2540 |
| Item Name | Bottle,stopper |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Manufacturer | Dumbo Defense Inc |
| Status | ACTIVE |
| Closure Size for Which Designed | NO. 9 RUBBER STOPPER |
| Overall Diameter | 4.500 INCHES NOMINAL IN |
| Glass Type | REAGENT RESISTANT |
| Shape | ROUND |
| Departure From Cited Document | PARA 3.2.2 REAGENT BOTTLES |
| Capacity Rating | 1.0 LITERS |
| Color | AMBER OR BROWN |
| Closure Type | STOPPER AND STOPPER W/TWO HOLES |
| Material | GLASS LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| 2540 PRIMARY | Dumbo Defense Inc (USA) |
| Reference | Meaning |
|---|---|
| MILW16642 | 4/1 Identification reference U.S. Government activity |
| 2540 | 5/9 Secondary reference U.S. Government activity |
NSN 6640-00-702-2540 is a Bottle,stopper, manufactured by Dumbo Defense Inc, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
NSN 6640-00-702-2540 has 1 manufacturer part number on file: 2540 (Dumbo Defense Inc).
1 possible match (shared part number, not a government interchangeability claim): 6640-01-398-8554. Verify interchangeability with system specifications before substitution.
Key specifications for 2540: Overall Height: 8.000 INCHES MAXIMUM IN; Closure Size for Which Designed: NO. 9 RUBBER STOPPER; Overall Diameter: 4.500 INCHES NOMINAL IN; Glass Type: REAGENT RESISTANT. 9 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.