The Gasket, cataloged under National Stock Number 5330-00-256-0820, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Bird Electronic Corporation Div Bird Electronic Corp. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-00-256-0820 |
| Primary Part Number | A7890-023 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Bird Electronic Corporation Div Bird Electronic Corp |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.050 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Material Document and Classification | QQ-L-201 GR B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR METAL |
| Outside Diameter | 3.125 INCHES NOMINAL IN |
| Aperture Diameter | 1.750 INCHES NOMINAL IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 2.625 INCHES NOMINAL IN |
| Material | LEAD OVERALL |
| Hole Diameter | 0.281 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 |
|---|---|
| A7890-023 PRIMARY | Bird Electronic Corporation Div Bird Electronic Corp (USA) |
| Reference | Meaning |
|---|---|
| A78923 | 5/9 Secondary reference Bird Electronic Corporation Div Bird Electronic Corp |
NSN 5330-00-256-0820 is a Gasket, manufactured by Bird Electronic Corporation Div Bird Electronic Corp, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-256-0820 has 1 manufacturer part number on file: A7890-023 (Bird Electronic Corporation Div Bird Electronic Corp).
Key specifications for A7890-023: Cross-Sectional Thickness: 0.050 INCHES NOMINAL IN; Style Designator: CIRCULAR; Material Document and Classification: QQ-L-201 GR B FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR METAL. 10 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.