The Plug,vent, cataloged under National Stock Number 5340-01-438-9440, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is D. W. Industries, Inc. Dba Dw Ind. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-438-9440 |
| Primary Part Number | 321620 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | D. W. Industries, Inc. Dba Dw Ind |
| Status | ACTIVE |
| Length | 0.780 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Outside Diameter | 0.530 INCHES NOMINAL IN |
| Thread Size and Series/type Designator | 1/8-27 NPTF |
| 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 |
|---|---|
| 12420801 | Oshkosh Defense Llc (USA) |
| 321620 PRIMARY | D. W. Industries, Inc. Dba Dw Ind (USA) |
| 12420801 | Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA) |
| 12420801 | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12420801 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5340-01-438-9440 is a Plug,vent, manufactured by D. W. Industries, Inc. Dba Dw Ind, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-438-9440 has 4 manufacturer part numbers on file: 12420801 (Oshkosh Defense Llc), 321620 (D. W. Industries, Inc. Dba Dw Ind), 12420801 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12420801 (Amz Alabama Inc.).
Key specifications for 321620: Length: 0.780 INCHES NOMINAL IN; End Connection Type: THREADED; Outside Diameter: 0.530 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: VENT, AIR BREATHER TYPE. 4 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.