The Dryer and Heater,intake Air, cataloged under National Stock Number 2590-01-206-3589, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2590-01-206-3589 |
| Primary Part Number | 4SK390 |
| Item Name | Dryer and Heater,intake Air |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| General Characteristics Item Description | DRIES AND PREHEATS AIR FOR ENGINE OF FIRE TRUCK; OVERALL DIMENSIONS ARE 19.69 IN HIGH BY MAX OF 6.83 IN DIAMETER; 2 STANDARD MUFFLER CLAMPS INCLUDED ARE 4.64 IN BETWEEN BOLT CENTERS 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 |
|---|---|
| KN33540 | Cbt Corporation (USA) |
| 4SK390 PRIMARY | Oshkosh Defense Llc (USA) |
| KN33540 | Haldex Brake Products Corporation (USA) |
| FF9860-01-24T | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1369780 | 5/9 Secondary reference Oshkosh Corp |
| FF9860-01-24T | 5/9 Secondary reference Cbt Corporation |
| 4SK390 | 5/9 Secondary reference Oshkosh Corp |
NSN 2590-01-206-3589 is a Dryer and Heater,intake Air, manufactured by Oshkosh Defense Llc, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-01-206-3589 has 4 manufacturer part numbers on file: KN33540 (Cbt Corporation), 4SK390 (Oshkosh Defense Llc), KN33540 (Haldex Brake Products Corporation), FF9860-01-24T (Danfoss Power Solutions II, Llc).
Key specifications for 4SK390: General Characteristics Item Description: DRIES AND PREHEATS AIR FOR ENGINE OF FIRE TRUCK; OVERALL DIMENSIONS ARE 19.69 IN HIGH BY MAX OF 6.83 IN DIAMETER; 2 STANDARD MUFFLER CLAMPS INCLUDED ARE 4.64 IN BETWEEN BOLT CENTERS IN; End Item Identification: P19 FIRE TRUCK. 1 specification is 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.