The Control Assembly,transmission, cataloged under National Stock Number 2520-01-331-6550, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is The Columbus Equipment Company. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Control Assembly,transmission |
| FSC / FSG | 2520 — Vehicular Power Transmission Components (FSG 25) |
| Manufacturers | The Columbus Equipment Company (CAGE 5A886); Bosch Rexroth Ag (CAGE D8782) |
| Parameter | Value |
|---|---|
| NSN | 2520-01-331-6550 |
| Primary Part Number | 10446664 |
| Item Name | Control Assembly,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | The Columbus Equipment Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| 10446664 PRIMARY | The Columbus Equipment Company (USA) |
| 4TH7K-10/1M | Bosch Rexroth Ag (DEU) |
| Reference | Meaning |
|---|---|
| D30541 | 5/9 Secondary reference Ingersoll-Rand Canada Inc |
NSN 2520-01-331-6550 is a Control Assembly,transmission, manufactured by The Columbus Equipment Company, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-331-6550 has 2 manufacturer part numbers on file: 10446664 (The Columbus Equipment Company), 4TH7K-10/1M (Bosch Rexroth Ag).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-578-0249. Verify interchangeability with system specifications before substitution.
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.