The Filter Element,fluid, cataloged under National Stock Number 4330-00-331-9940, 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 Union Carbide Corp Sub of Dow Co the. 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4330-00-331-9940 |
| Primary Part Number | D-183750 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Union Carbide Corp Sub of Dow Co the |
| Status | ACTIVE |
| Filtering Media Design | SINTERED SINGLE FILTERING MEDIA RESPONSE |
| Body Diameter | 1.250 INCHES NOMINAL IN |
| Body Overall Length | 4.000 INCHES NOMINAL IN |
| Flow Direction | INSIDE OUT |
| Design Type | LIMITED |
| Style Designator | CYLINDRICAL W/OUT CONTAINER |
| Body Inside Diameter | 0.875 INCHES NOMINAL IN |
| Media for Which Designed | ANY ACCEPTABLE |
| Material | COPPER ALLOY 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 |
|---|---|
| D-183750 PRIMARY | Union Carbide Corp Sub of Dow Co the (USA) |
| Reference | Meaning |
|---|---|
| 05T46 | 5/9 Secondary reference Union Carbide Corp Sub of Dow Co the |
| S2300A3117076REV15H4PC5 | 5/9 Secondary reference U.S. Government activity |
| D252811SH4PC5 | 5/9 Secondary reference Union Carbide Corp Sub of Dow Co the |
| B250091PC5 | 5/9 Secondary reference Union Carbide Corp Sub of Dow Co the |
| D3111746REV1PC5 | 5/9 Secondary reference U.S. Government activity |
| 183750 | 5/9 Secondary reference Union Carbide Corp Sub of Dow Co the |
| B3111751REV1 | 5/9 Secondary reference U.S. Government activity |
NSN 4330-00-331-9940 is a Filter Element,fluid, manufactured by Union Carbide Corp Sub of Dow Co the, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-00-331-9940 has 1 manufacturer part number on file: D-183750 (Union Carbide Corp Sub of Dow Co the).
1 possible match (shared part number, not a government interchangeability claim): 5325-00-527-4040. Verify interchangeability with system specifications before substitution.
Key specifications for D-183750: Filtering Media Design: SINTERED SINGLE FILTERING MEDIA RESPONSE; Body Diameter: 1.250 INCHES NOMINAL IN; Body Overall Length: 4.000 INCHES NOMINAL IN; Flow Direction: INSIDE OUT. 9 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.