The Gasket, cataloged under National Stock Number 5330-01-389-9454, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Welch Vacuum Technology Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5330-01-389-9454 |
| Primary Part Number | 41-0643 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Welch Vacuum Technology Inc |
| Status | ACTIVE |
| Style Designator | CIRCULAR |
| Outside Diameter | 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN |
| Aperture Diameter | 1.125 INCHES NOMINAL IN |
| Bolt Hole Quantity | 3 |
| Bolt Circle Diameter | 1.594 INCHES NOMINAL IN |
| Environmental Attribute Code | ASBESTOS ALTERNATIVE PRODUCTS |
| Hole Diameter | 0.203 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 41-0643 PRIMARY | Welch Vacuum Technology Inc (USA) |
| Reference | Meaning |
|---|---|
| 41-0643 NON-ASBESTOS | 5/9 Secondary reference Sargent-Welch Scientific Co |
NSN 5330-01-389-9454 is a Gasket, manufactured by Welch Vacuum Technology Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-389-9454 has 1 manufacturer part number on file: 41-0643 (Welch Vacuum Technology Inc).
Key specifications for 41-0643: Style Designator: CIRCULAR; Outside Diameter: 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN; Aperture Diameter: 1.125 INCHES NOMINAL IN; Bolt Hole Quantity: 3. 7 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.