The Plug,vent, cataloged under National Stock Number 5340-01-100-4991, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hatz Diesel of America Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-100-4991 |
| Primary Part Number | 49003900 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hatz Diesel of America Inc |
| Status | ACTIVE |
| Vent Hole Diameter | 0.062 INCHES NOMINAL IN |
| Length | 0.575 INCHES NOMINAL IN |
| Vent Hole Shape | ROUND |
| End Connection Type | UNTHREADED |
| Taper Minor Diameter | 0.165 INCHES IN |
| Outside Diameter | 0.300 INCHES NOMINAL IN |
| Unthreaded End Length | 0.500 INCHES NOMINAL IN |
| End Connection Taper Number | 1 |
| Inside Diameter | 0.065 INCHES NOMINAL IN |
| Material | STEEL |
| Taper Major Diameter | 0.181 INCHES IN |
| Vent Hole Quantity | 1 |
| 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 |
|---|---|
| 49003900 PRIMARY | Hatz Diesel of America Inc (USA) |
| Reference | Meaning |
|---|---|
| 82379 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 5340-01-100-4991 is a Plug,vent, manufactured by Hatz Diesel of America Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-100-4991 has 1 manufacturer part number on file: 49003900 (Hatz Diesel of America Inc).
Key specifications for 49003900: Vent Hole Diameter: 0.062 INCHES NOMINAL IN; Length: 0.575 INCHES NOMINAL IN; Vent Hole Shape: ROUND; End Connection Type: UNTHREADED. 12 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.