The Plug,expansion, cataloged under National Stock Number 5340-01-149-7977, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-149-7977 |
| Primary Part Number | 3999200 |
| Item Name | Plug,expansion |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Outside Diameter | 2.224 INCHES MINIMUM AND 2.227 INCHES MAXIMUM IN |
| Style Designator | CUP |
| Material Document and Classification | SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN |
| Height | 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
|---|---|
| 3999200 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 399920 | Boeing Distribution Services Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 5340PL0863262 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5340011497977 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3999200 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 5340-01-149-7977 is a Plug,expansion, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-149-7977 has 2 manufacturer part numbers on file: 3999200 (General Motors Llc Dba General Motors Llc), 399920 (Boeing Distribution Services Defense Llc).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-601-5430. Verify interchangeability with system specifications before substitution.
Key specifications for 3999200: Outside Diameter: 2.224 INCHES MINIMUM AND 2.227 INCHES MAXIMUM IN; Style Designator: CUP; Material Document and Classification: SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE; Material Thickness: 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN. 6 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.