The Filter,fluid, cataloged under National Stock Number 2940-01-439-0594, is classified within Federal Supply Class 2940 (Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Hydac Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2940-01-439-0594 |
| Primary Part Number | HF4-1-R-1-25-010BN-E-I-12-NT |
| Item Name | Filter,fluid |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Hydac Corp |
| Status | ACTIVE |
| Filtration Rating in Microns | 10.0 ABSOLUTE |
| Rotation Method | HYDRAULIC MOTOR |
| Design Type | NONREUSABLE |
| Operating Pressure | 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Filtering Element Quantity | 1 |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Material | STEEL BODY |
| Rotating Device Type | ELEMENT |
| 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 |
|---|---|
| HF4-1-R-1-25-010BN-E-I-12-NT PRIMARY | Hydac Corp (USA) |
| Reference | Meaning |
|---|---|
| HF4-1-R-1-25-010BN-E-I-12-TN | 5/9 Secondary reference Hydac Corp |
NSN 2940-01-439-0594 is a Filter,fluid, manufactured by Hydac Corp, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-01-439-0594 has 1 manufacturer part number on file: HF4-1-R-1-25-010BN-E-I-12-NT (Hydac Corp).
Key specifications for HF4-1-R-1-25-010BN-E-I-12-NT: Filtration Rating in Microns: 10.0 ABSOLUTE; Rotation Method: HYDRAULIC MOTOR; Design Type: NONREUSABLE; Operating Pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS. 8 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.