The Filter Unit,microporous, cataloged under National Stock Number 6640-01-341-7477, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. The manufacturer of record is Cv International, Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6640-01-341-7477 |
| Primary Part Number | 328081-1 |
| Item Name | Filter Unit,microporous |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Manufacturer | Cv International, Inc. |
| Status | ACTIVE |
| Absorbent Pad | NOT INCLUDED |
| Filtration Rating in Microns | 0.65 ABSOLUTE |
| Filtering Area | 14.04 SQUARE CENTIMETERS NOMINAL |
| Filter Disk Size Accommodated | 47.0 MILLIMETERS MM |
| Material | ALUMINUM |
| Grid Markings | NOT INCLUDED |
| 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 |
|---|---|
| 328081-1 PRIMARY | Cv International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 328081 | 5/9 Secondary reference Cv International, Inc. |
| 5VM 283834 | 5/1 Secondary reference Naval Medical Material Support Command Detachment |
NSN 6640-01-341-7477 is a Filter Unit,microporous, manufactured by Cv International, Inc., classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
NSN 6640-01-341-7477 has 1 manufacturer part number on file: 328081-1 (Cv International, Inc.).
Key specifications for 328081-1: Absorbent Pad: NOT INCLUDED; Filtration Rating in Microns: 0.65 ABSOLUTE; Filtering Area: 14.04 SQUARE CENTIMETERS NOMINAL; Filter Disk Size Accommodated: 47.0 MILLIMETERS MM. 6 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.