The Breather, cataloged under National Stock Number 2520-01-077-2803, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Breather |
| FSC / FSG | 2520 — Vehicular Power Transmission Components (FSG 25) |
| Manufacturers | Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Service Express Company, Inc (CAGE 0L0H1); Tri Component Product Corp. Dba Tri Component Product Corp (CAGE 1T973) |
| Parameter | Value |
|---|---|
| NSN | 2520-01-077-2803 |
| Primary Part Number | 9N1597 |
| Item Name | Breather |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| 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 |
|---|---|
| 9N1597 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 772803 | Service Express Company, Inc (USA) |
| T9N1597 PRIMARY | Tri Component Product Corp. Dba Tri Component Product Corp (USA) |
| Reference | Meaning |
|---|---|
| 1350 | 5/9 Secondary reference I-V Die Mold Corp |
NSN 2520-01-077-2803 is a Breather, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-077-2803 has 3 manufacturer part numbers on file: 9N1597 (Caterpillar Inc Div Caterpillar Defense), 772803 (Service Express Company, Inc), T9N1597 (Tri Component Product Corp. Dba Tri Component Product Corp).
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.