The Plug,expansion, cataloged under National Stock Number 5340-01-358-5678, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-358-5678 |
| Primary Part Number | AS3123-59 |
| Item Name | Plug,expansion |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE |
| Radius | 0.010 INCHES NOMINAL IN |
| Outside Diameter | 0.4153 INCHES MINIMUM AND 0.4162 INCHES MAXIMUM IN |
| Style Designator | CUP |
| Material Document and Classification | ALLOY 2024, T4 NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.0316 INCHES NOMINAL IN |
| Height | 0.3580 INCHES MINIMUM AND 0.3720 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2024 |
| Smallest Diameter | 0.021 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| AS3123-59 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS3123 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS3123-59 | 5/9 Secondary reference U.S. Government activity |
| AS3123-59 | 5/9 Secondary reference General Electric Company |
| PLGA4165010 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-01-358-5678 is a Plug,expansion, manufactured by Sae International Dba Sae International, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-358-5678 has 1 manufacturer part number on file: AS3123-59 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-418-6728. Verify interchangeability with system specifications before substitution.
Key specifications for AS3123-59: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE; Radius: 0.010 INCHES NOMINAL IN; Outside Diameter: 0.4153 INCHES MINIMUM AND 0.4162 INCHES MAXIMUM IN; Style Designator: CUP. 10 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.
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.