The Plug,vent, cataloged under National Stock Number 5340-01-643-8069, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Brennan Industries, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-643-8069 |
| Primary Part Number | 6408-H-16-O-SS |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Brennan Industries, Inc. |
| Status | ACTIVE |
| Length | 0.775 INCHES NOMINAL IN |
| Thread Length | 1.312 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 12 UN |
| 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 |
|---|---|
| 6408-H-16-O-SS PRIMARY | Brennan Industries, Inc. (USA) |
| F163628 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 7526221 | D/9 Drawing number reference only Naval Sea Systems Command |
| F162233 REV - ITEM NO.16 | C/1 Advisory reference — outside the item-of-supply concept Lake Shore Systems, Inc. |
NSN 5340-01-643-8069 is a Plug,vent, manufactured by Brennan Industries, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-643-8069 has 2 manufacturer part numbers on file: 6408-H-16-O-SS (Brennan Industries, Inc.), F163628 (Lake Shore Systems, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-643-9822, 5330-01-643-9870, 5310-01-643-9975. Verify interchangeability with system specifications before substitution.
Key specifications for 6408-H-16-O-SS: Length: 0.775 INCHES NOMINAL IN; Thread Length: 1.312 INCHES NOMINAL IN; End Connection Type: THREADED; Outside Diameter: 1.000 INCHES NOMINAL 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.