The Breather, cataloged under National Stock Number 2520-01-236-0657, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Daimler Truck North America Llc. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Breather |
| FSC / FSG | 2520 — Vehicular Power Transmission Components (FSG 25) |
| Manufacturers | Mercedes-Benz Ag (CAGE CN7Z7); Daimler Truck North America Llc (CAGE 64678); Happich Gmbh (CAGE D8905) |
| Parameter | Value |
|---|---|
| NSN | 2520-01-236-0657 |
| Primary Part Number | 580 K 0011-2 |
| Item Name | Breather |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Daimler Truck North America Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 580 K 0011-2 | Mercedes-Benz Ag (DEU) |
| 406 766 00 91 | Mercedes-Benz Ag (DEU) |
| 406 766 00 91 | Daimler Truck North America Llc (USA) |
| 580 K 0011-2 | Happich Gmbh (DEU) |
| 406 766 00 91 | Happich Gmbh (DEU) |
| 580 K 0011-2 PRIMARY | Daimler Truck North America Llc (USA) |
| Reference | Meaning |
|---|---|
| 406 766 00 91 | 5/9 Secondary reference Daimler Ag |
| 580 K 0011-2 | 5/9 Secondary reference Daimler Ag |
NSN 2520-01-236-0657 is a Breather, manufactured by Daimler Truck North America Llc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-236-0657 has 6 manufacturer part numbers on file: 580 K 0011-2 (Mercedes-Benz Ag), 406 766 00 91 (Mercedes-Benz Ag), 406 766 00 91 (Daimler Truck North America Llc), 580 K 0011-2 (Happich Gmbh), 406 766 00 91 (Happich Gmbh) and 1 more.
Possible hazard — SDS may be required (DLA HMIC P). 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.