The Circuit Card Assembly, cataloged under National Stock Number 5998-01-657-5752, is classified within Federal Supply Class 5998 (Electrical and Electronic Assemblies, Boards, Cards, and Associated Hardware) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Services, Llc. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5998-01-657-5752 |
| Primary Part Number | 749976-B21 |
| Item Name | Circuit Card Assembly |
| FSC / FSG | 5998 / 59 — Electrical and Electronic Assemblies, Boards, Cards, and Associated Hardware |
| Manufacturer | Lockheed Martin Services, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Acquisition advice code | C |
| Part Number | Manufacturer |
|---|---|
| 749976-B21 PRIMARY | Lockheed Martin Services, Llc (USA) |
| 749974-B21 | Hewlett-Packard Company (USA) |
| 749974-B21 | Lockheed Martin Services, Llc (USA) |
NSN 5998-01-657-5752 is a Circuit Card Assembly, manufactured by Lockheed Martin Services, Llc, classified under FSC 5998, Electrical and Electronic Assemblies, Boards, Cards, and Associated Hardware. Status: active.
NSN 5998-01-657-5752 has 3 manufacturer part numbers on file: 749976-B21 (Lockheed Martin Services, Llc), 749974-B21 (Hewlett-Packard Company), 749974-B21 (Lockheed Martin Services, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-658-8357. Verify interchangeability with system specifications before substitution.
Key specifications for 749976-B21: Special Features: CONTROL, STORAGE - HBA, SATA/SAS; End Item Identification: ENROUTE AUTOMATION MODERNIZATION (ERAM). 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.
NSN 5998-01-657-5752 has DEMIL Code Q. 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.