The Filter,fluid, cataloged under National Stock Number 4330-01-045-0018, 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 Electro Freeto Manufacturing Company Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-045-0018 |
| Primary Part Number | 581934-1 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Electro Freeto Manufacturing Company Inc |
| Status | ACTIVE |
| Design Type | NONREUSABLE |
| Filtering Element Quantity | 2 |
| Body Length | 6.250 INCHES NOMINAL IN |
| Filtering System for Which Designed | FULL FLOW |
| 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 |
|---|---|
| 581934-1 PRIMARY | Electro Freeto Manufacturing Company Inc (USA) |
| Reference | Meaning |
|---|---|
| 581934-1 | 5/9 Secondary reference Raytheon Company Div Corp |
| 581934 | D/9 Drawing number reference only Raytheon Company Div Corp |
NSN 4330-01-045-0018 is a Filter,fluid, manufactured by Electro Freeto Manufacturing Company Inc, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-045-0018 has 1 manufacturer part number on file: 581934-1 (Electro Freeto Manufacturing Company Inc).
4 possible matches (shared part number, not a government interchangeability claim): 4330-01-055-4528, 4330-01-055-4529, 4330-01-055-4531. Verify interchangeability with system specifications before substitution.
Key specifications for 581934-1: Design Type: NONREUSABLE; Filtering Element Quantity: 2; Body Length: 6.250 INCHES NOMINAL IN; Filtering System for Which Designed: FULL FLOW. 4 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.