The Filter Element,fluid, cataloged under National Stock Number 2940-01-435-1635, 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 Cummins Filtration Inc Dba Fleetguard Div Cummins Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2940-01-435-1635 |
| Primary Part Number | HF6521 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Cummins Filtration Inc Dba Fleetguard Div Cummins Inc |
| Status | ACTIVE |
| Body Diameter | 3.730 INCHES NOMINAL IN |
| Body Overall Length | 8.000 INCHES NOMINAL IN |
| Filtration Rating in Microns | 28.000 NOMINAL |
| Flow Direction | INSIDE OUT |
| Design Type | NONREUSABLE |
| Style Designator | BOWL |
| Thread Direction | RIGHT-HAND |
| 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 |
|---|---|
| HF6521 PRIMARY | Cummins Filtration Inc Dba Fleetguard Div Cummins Inc (USA) |
| Reference | Meaning |
|---|---|
| HF6521 | 5/9 Secondary reference Fleetguard Inc |
NSN 2940-01-435-1635 is a Filter Element,fluid, manufactured by Cummins Filtration Inc Dba Fleetguard Div Cummins Inc, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-01-435-1635 has 1 manufacturer part number on file: HF6521 (Cummins Filtration Inc Dba Fleetguard Div Cummins Inc).
Key specifications for HF6521: Body Diameter: 3.730 INCHES NOMINAL IN; Body Overall Length: 8.000 INCHES NOMINAL IN; Filtration Rating in Microns: 28.000 NOMINAL; Flow Direction: INSIDE OUT. 7 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.