The Holder,electrical Card, cataloged under National Stock Number 5998-01-044-8939, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5998-01-044-8939 |
| Primary Part Number | 639AS1256 |
| Item Name | Holder,electrical Card |
| FSC / FSG | 5998 / 59 — Electrical and Electronic Assemblies, Boards, Cards, and Associated Hardware |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE |
| Body Style | DOUBLE FLAIR ENTRY |
| Unthreaded Mounting Hole Diameter | 0.067 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Material Document and Classification | QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | CADMIUM |
| Material | COPPER ALLOY |
| 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 | JN |
| Part Number | Manufacturer |
|---|---|
| 639AS1256 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 21B-1021-2-12-3 | Schroff Inc (USA) |
| Reference | Meaning |
|---|---|
| 11567787 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
| 21B-2-12-3 | 5/9 Secondary reference Schroff Inc |
NSN 5998-01-044-8939 is a Holder,electrical Card, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5998, Electrical and Electronic Assemblies, Boards, Cards, and Associated Hardware. Status: active.
NSN 5998-01-044-8939 has 2 manufacturer part numbers on file: 639AS1256 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 21B-1021-2-12-3 (Schroff Inc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-203-5020. Verify interchangeability with system specifications before substitution.
Key specifications for 639AS1256: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 0.125 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE; Body Style: DOUBLE FLAIR ENTRY. 7 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.