The Control Assembly,transmission, cataloged under National Stock Number 2520-01-644-3979, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 2520-01-644-3979 |
| Primary Part Number | A5900WP3 |
| Item Name | Control Assembly,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| 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 |
|---|---|
| 4215017 | Oshkosh Defense Llc (USA) |
| A5900WP3 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| A5900WP3 | C/1 Advisory reference — outside the item-of-supply concept Interstate Power Systems Inc |
| A5900WP3 | 5/9 Secondary reference Inland Detroit Diesel-Allison, Inc. |
NSN 2520-01-644-3979 is a Control Assembly,transmission, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-644-3979 has 2 manufacturer part numbers on file: 4215017 (Oshkosh Defense Llc), A5900WP3 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for A5900WP3: Overall Height: 6.34 INCHES NOMINAL IN; Overall Length: 6.00 INCHES NOMINAL IN; Overall Width: 1.97 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: TCM, 3500SP, BRIDGE, 24V, 2600RPM V. 0 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.