The Disk,clutch,vehicular, cataloged under National Stock Number 2520-01-022-2991, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Barney & White Auto Parts Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-01-022-2991 |
| Primary Part Number | 21551 |
| Item Name | Disk,clutch,vehicular |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Barney & White Auto Parts Inc |
| Status | ACTIVE |
| Disk Material | STEEL |
| Design Type | WET |
| Teeth Quantity Per Disk | 54 |
| Flexibility | RIGID |
| Disk Type | EXTERNAL TEETH |
| 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 |
|---|---|
| 22A12F | Trw Inc Trw Intl Trade Government Sales Dept (USA) |
| 21551 PRIMARY | Barney & White Auto Parts Inc (USA) |
| 895412 | Dana Off Highway Products, Llc (USA) |
| 3150912 | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 895412 | 5/9 Secondary reference Clark Equipment Co |
| 22A12F | 5/9 Secondary reference Barmatic Products Co |
| C8AZ7B442A | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| C8AZ7B442A | 5/9 Secondary reference Ford Motor Company |
NSN 2520-01-022-2991 is a Disk,clutch,vehicular, manufactured by Barney & White Auto Parts Inc, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-022-2991 has 4 manufacturer part numbers on file: 22A12F (Trw Inc Trw Intl Trade Government Sales Dept), 21551 (Barney & White Auto Parts Inc), 895412 (Dana Off Highway Products, Llc), 3150912 (Am General Llc).
6 possible matches (shared part number, not a government interchangeability claim): 6625-01-085-7345, 5340-01-095-3764, 2990-01-096-9203. Verify interchangeability with system specifications before substitution.
Key specifications for 21551: Disk Material: STEEL; Design Type: WET; Teeth Quantity Per Disk: 54; Flexibility: RIGID. 5 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.