The Gasket, cataloged under National Stock Number 5330-01-550-2821, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Ernst, John C & Co, Inc.. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Gasket |
| FSC / FSG | 5330 — Packing and Gasket Materials (FSG 53) |
| Manufacturers | Ernst, John C & Co, Inc. (CAGE 51857) |
| Parameter | Value |
|---|---|
| NSN | 5330-01-550-2821 |
| Primary Part Number | 556SW-5/8X5/16X3/8 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Ernst, John C & Co, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 415-04-PC34-556 | Ernst, John C & Co, Inc. (USA) |
| 556SW-5/8X5/16X3/8 PRIMARY | Ernst, John C & Co, Inc. (USA) |
| E41500 KEY 34 1/2-3/4 NPT | Ernst, John C & Co, Inc. (USA) |
| Reference | Meaning |
|---|---|
| E41500 | D/9 Drawing number reference only Ernst, John C & Co, Inc. |
NSN 5330-01-550-2821 is a Gasket, manufactured by Ernst, John C & Co, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-550-2821 has 3 manufacturer part numbers on file: 415-04-PC34-556 (Ernst, John C & Co, Inc.), 556SW-5/8X5/16X3/8 (Ernst, John C & Co, Inc.), E41500 KEY 34 1/2-3/4 NPT (Ernst, John C & Co, Inc.).
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.