The Disk Drive Unit, cataloged under National Stock Number 7025-01-669-2636, is classified within Federal Supply Class 7025 (Information Technology Input/output and Storage Devices) of the General Purpose ADP Equipment group. The manufacturer of record is W R Systems Ltd Dba Alert. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 7025-01-669-2636 |
| Primary Part Number | 539480 |
| Item Name | Disk Drive Unit |
| FSC / FSG | 7025 / 70 — Information Technology Input/output and Storage Devices |
| Manufacturer | W R Systems Ltd Dba Alert |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | Z |
| Part Number | Manufacturer |
|---|---|
| 539480 | W R Systems Ltd Dba Alert (USA) |
| Reference | Meaning |
|---|---|
| 539480 | 7/2 Vendor item drawing reference Navy, United States Department of the Dba Space & Naval Warfare Systems Center, Atlantic |
| DV-W28SS-B | 3/9 Design control — primary reference Teac America, Inc |
NSN 7025-01-669-2636 is a Disk Drive Unit, manufactured by W R Systems Ltd Dba Alert, classified under FSC 7025, Information Technology Input/output and Storage Devices. Status: active.
NSN 7025-01-669-2636 has 1 manufacturer part number on file: 539480 (W R Systems Ltd Dba Alert).
Key specifications for 539480: Part Name Assigned by Controlling Agency: DISK DRIVE UNIT; End Item Identification: 1747/WSN 5367. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.