The Computer Subassembly, cataloged under National Stock Number 7021-01-554-8255, is classified within Federal Supply Class 7021 (Information Technology Central Processing Unit (cpu, Computer), Digital) of the General Purpose ADP Equipment group. The manufacturer of record is L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Computer Subassembly |
| FSC / FSG | 7021 — Information Technology Central Processing Unit (cpu, Computer), Digital (FSG 70) |
| Manufacturers | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division (CAGE 23905) |
| Parameter | Value |
|---|---|
| NSN | 7021-01-554-8255 |
| Primary Part Number | 4158A0500-5 |
| Item Name | Computer Subassembly |
| FSC / FSG | 7021 / 70 — Information Technology Central Processing Unit (cpu, Computer), Digital |
| Manufacturer | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4158A0500-5 PRIMARY | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division (USA) |
| PL4158A3010-99 IT 100 | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division (USA) |
| Reference | Meaning |
|---|---|
| 4158A0500-1 | 5/9 Secondary reference L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
NSN 7021-01-554-8255 is a Computer Subassembly, manufactured by L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division, classified under FSC 7021, Information Technology Central Processing Unit (cpu, Computer), Digital. Status: active.
NSN 7021-01-554-8255 has 2 manufacturer part numbers on file: 4158A0500-5 (L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division), PL4158A3010-99 IT 100 (L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division).
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.