The Gasket, cataloged under National Stock Number 5330-00-994-6423, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Grimes Aerospace Company. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-994-6423 |
| Primary Part Number | A5621-1 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT NAVIGATION LIGHTS |
| Cross-Sectional Thickness | 0.093 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 3.437 INCHES NOMINAL IN |
| Aperture Diameter | 3.171 INCHES NOMINAL IN |
| Material | RUBBER SILICONE CLASS Q OVERALL |
| 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 |
|---|---|
| A5621-1 PRIMARY | Grimes Aerospace Company (USA) |
NSN 5330-00-994-6423 is a Gasket, manufactured by Grimes Aerospace Company, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-994-6423 has 1 manufacturer part number on file: A5621-1 (Grimes Aerospace Company).
Key specifications for A5621-1: FSC Application Data: AIRCRAFT NAVIGATION LIGHTS; Cross-Sectional Thickness: 0.093 INCHES NOMINAL IN; Style Designator: CIRCULAR; Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION. 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.