The Gasket, cataloged under National Stock Number 5330-01-027-3121, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Eaton Corporation Div Fed. Government technical data includes 8 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 | 5330-01-027-3121 |
| Primary Part Number | B4939-0004 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Eaton Corporation Div Fed |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PSA0885 FSCM 15284 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Cross-Sectional Thickness | 0.017 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Material Document and Classification | AMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.654 INCHES MAXIMUM IN |
| Aperture Diameter | 0.397 INCHES MINIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Material | NICKEL ALLOY 625 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 |
|---|---|
| B4939-0004 PRIMARY | Eaton Corporation Div Fed (USA) |
NSN 5330-01-027-3121 is a Gasket, manufactured by Eaton Corporation Div Fed, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-027-3121 has 1 manufacturer part number on file: B4939-0004 (Eaton Corporation Div Fed).
Key specifications for B4939-0004: Surface Treatment Document and Classification: PSA0885 FSCM 15284 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Cross-Sectional Thickness: 0.017 INCHES NOMINAL IN; Style Designator: CIRCULAR; Material Document and Classification: AMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 8 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.