The Cooler,fluid,transmission, cataloged under National Stock Number 2520-01-168-6448, 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. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2520-01-168-6448 |
| Primary Part Number | 778110 |
| Item Name | Cooler,fluid,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Length | 30.250 INCHES NOMINAL IN |
| Oil Flow Rate | 16.2 POUNDS PER MINUTE LBS |
| Material Thickness | 4.312 INCHES NOMINAL IN |
| 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 |
|---|---|
| 778110 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 06001211 | 5/9 Secondary reference Caterpillar Paving Products Inc |
| 326-410 | 5/9 Secondary reference Karmazin Products Corp |
| 06001211 | 5/9 Secondary reference Karmazin Products Corp |
NSN 2520-01-168-6448 is a Cooler,fluid,transmission, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-168-6448 has 1 manufacturer part number on file: 778110 (Caterpillar Inc Div Caterpillar Defense).
1 possible match (shared part number, not a government interchangeability claim): 6635-01-281-5485. Verify interchangeability with system specifications before substitution.
Key specifications for 778110: Length: 30.250 INCHES NOMINAL IN; Oil Flow Rate: 16.2 POUNDS PER MINUTE LBS; Material Thickness: 4.312 INCHES NOMINAL IN; End Item Identification: 3895-01-135-3703. 3 specifications are documented in the U.S. Government catalog.
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.