The Filter Element,fluid, cataloged under National Stock Number 4330-00-487-9387, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Crest Ultrasonics Corp. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4330-00-487-9387 |
| Primary Part Number | 20-31-003 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Crest Ultrasonics Corp |
| Status | ACTIVE |
| Filtering Media Design | SINTERED SINGLE FILTERING MEDIA RESPONSE |
| Body Diameter | 2.750 INCHES NOMINAL IN |
| Body Overall Length | 3.531 INCHES NOMINAL IN |
| Filtration Rating in Microns | 10.0 NOMINAL |
| Flow Direction | INSIDE OUT |
| Design Type | LIMITED |
| Style Designator | CYLINDRICAL W/CLOSED ENDS |
| Body Inside Diameter | 1.000 INCHES NOMINAL IN |
| Media for Which Designed | ANY ACCEPTABLE |
| Material | RUBBER NATURAL FILTERING MEDIUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 20-31-003 PRIMARY | Crest Ultrasonics Corp (USA) |
| Reference | Meaning |
|---|---|
| 20-31-001 | 5/9 Secondary reference Crest Ultrasonics Corp |
| 20-31-001 | 5/9 Secondary reference Atkomatic Valve Co Inc |
NSN 4330-00-487-9387 is a Filter Element,fluid, manufactured by Crest Ultrasonics Corp, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-00-487-9387 has 1 manufacturer part number on file: 20-31-003 (Crest Ultrasonics Corp).
1 possible match (shared part number, not a government interchangeability claim): 5950-00-793-9925. Verify interchangeability with system specifications before substitution.
Key specifications for 20-31-003: Filtering Media Design: SINTERED SINGLE FILTERING MEDIA RESPONSE; Body Diameter: 2.750 INCHES NOMINAL IN; Body Overall Length: 3.531 INCHES NOMINAL IN; Filtration Rating in Microns: 10.0 NOMINAL. 10 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.
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.