The Filter Element,intake Air Cleane, cataloged under National Stock Number 2940-01-171-2120, 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 Farr Co. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2940-01-171-2120 |
| Primary Part Number | C-12233-4 |
| Item Name | Filter Element,intake Air Cleane |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Farr Co |
| Status | ACTIVE |
| Filtering Media Design | PLEATED SINGLE FILTERING MEDIA RESPONSE |
| Body Overall Length | 10.593 INCHES NOMINAL IN |
| Design Type | NONREUSABLE |
| Style Designator | RECTANGULAR (INCL SQUARE) |
| Material | PLASTIC SEAL |
| Body Thickness | 8.300 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 |
|---|---|
| C-12233-4 PRIMARY | Farr Co (USA) |
| PA-1774 PRIMARY | Baldwin Filters (USA) |
| CA307 PRIMARY | Honeywell International Inc Dba Honeywell Div Consumer Products Group (USA) |
| 42580 PRIMARY | Wix Corp (USA) |
| AF-2185 PRIMARY | Arvinmeritor Inc (USA) |
| Reference | Meaning |
|---|---|
| A317C | 5/9 Secondary reference General Motors Llc Dba General Motors |
| A317C | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 890257C1 | 5/2 Secondary reference U.S. Government activity |
NSN 2940-01-171-2120 is a Filter Element,intake Air Cleane, manufactured by Farr Co, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-01-171-2120 has 5 manufacturer part numbers on file: C-12233-4 (Farr Co), PA-1774 (Baldwin Filters), CA307 (Honeywell International Inc Dba Honeywell Div Consumer Products Group), 42580 (Wix Corp), AF-2185 (Arvinmeritor Inc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-648-0158. Verify interchangeability with system specifications before substitution.
Key specifications for C-12233-4: Filtering Media Design: PLEATED SINGLE FILTERING MEDIA RESPONSE; Body Overall Length: 10.593 INCHES NOMINAL IN; Design Type: NONREUSABLE; Style Designator: RECTANGULAR (INCL SQUARE). 6 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.