The Air Cleaner,intake, cataloged under National Stock Number 2940-00-403-5472, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2940-00-403-5472 |
| Primary Part Number | 6I2571 |
| Item Name | Air Cleaner,intake |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Integral Clamp | NOT INCLUDED |
| Filter Type | DRY |
| Element Replaceability | REPLACEABLE |
| Backfire Valve | NOT INCLUDED |
| Remote Location Inlet Adapter | NOT INCLUDED |
| Outlet Sleeve Type | INTERNAL |
| Quantity | 2 |
| Outside Diameter | 12.960 INCHES NOMINAL IN |
| Outlet Type | SLEEVE |
| Sleeve Inside Diameter | 6.000 INCHES NOMINAL IN |
| Sleeve Connection Quantity | 1 |
| Pressure Relief Valve | NOT INCLUDED |
| Inlet Type | SLEEVE |
| Material | STEEL |
| Air Cleaner Type | PERMANENT |
| Sleeve Location | LOCATED ON SIDE BODY 3.100 IN. FROM HORIZONTAL C TO C OF OPENING,5.620 IN. FROM BODY END OF CLEANER TO CENTERLINE OF INLET TUBE IN |
| Submersibility | NONSUBMERSIBLE |
| Mounting Inside Diameter | 4.620 INCHES NOMINAL IN |
| Outlet Location | BOTTOM OF CLEANER |
| Sleeve Length | 1.900 INCHES NOMINAL IN |
| 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 |
|---|---|
| 6I2571 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 612571 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
| EGB12-0074 | 5/9 Secondary reference Donaldson Company, Inc. |
| 9S9970 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 2940-00-403-5472 is a Air Cleaner,intake, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-00-403-5472 has 1 manufacturer part number on file: 6I2571 (Caterpillar Inc Div Caterpillar Defense).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-012-0080. Verify interchangeability with system specifications before substitution.
Key specifications for 6I2571: Overall Height: 14.030 INCHES MINIMUM AND 14.270 INCHES MAXIMUM IN; Integral Clamp: NOT INCLUDED; Filter Type: DRY; Element Replaceability: REPLACEABLE. 20 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.