The Seat,ball Socket, cataloged under National Stock Number 2520-00-522-5904, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 9 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-522-5904 |
| Primary Part Number | 5225904 |
| Item Name | Seat,ball Socket |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Shank Diameter | 0.984 INCHES MINIMUM AND 0.985 INCHES MAXIMUM IN |
| Material Hardness Rating | 48.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Radius | 0.3515 INCHES NOMINAL IN |
| Shank Length | 0.458 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-866,CL 4615 MIL SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 1.1562 INCHES NOMINAL IN |
| Material | STEEL COMP 4615 |
| Ball Seat Depth | 0.1719 INCHES NOMINAL IN |
| Hole Diameter | 0.0625 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5225904 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 9ZDK0483 PRIMARY | Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.) (USA) |
| 1898A53 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| 1898A53 | Meritor Industrial Products, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1898A53 | 5/9 Secondary reference Kaitlin Corp |
| 12A7074 | 3/2 Design control — primary reference U.S. Government activity |
| 364948 | 5/9 Secondary reference White Motor Corp |
| 2066178 | 5/9 Secondary reference General Motors Corp |
| BB5119 | 5/9 Secondary reference Diamond Reo Truck Co |
| 2066178 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 2066178 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
NSN 2520-00-522-5904 is a Seat,ball Socket, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-522-5904 has 4 manufacturer part numbers on file: 5225904 (U S Army Tank Automotive Command Amsta-Im-Mm), 9ZDK0483 (Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)), 1898A53 (Meritor Heavy Vehicle Systems, Llc), 1898A53 (Meritor Industrial Products, Llc).
Key specifications for 5225904: Shank Diameter: 0.984 INCHES MINIMUM AND 0.985 INCHES MAXIMUM IN; Overall Height: 0.6562 INCHES NOMINAL IN; Material Hardness Rating: 48.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Radius: 0.3515 INCHES NOMINAL IN. 9 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.
NSN 2520-00-522-5904 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.