The Seal,plain Encased, cataloged under National Stock Number 5330-01-425-0131, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Freudenberg-Nok General Partnership Dba International Seal Co Inc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-425-0131 |
| Primary Part Number | 4099057-501 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Freudenberg-Nok General Partnership Dba International Seal Co Inc |
| Status | ACTIVE |
| Attachment Hole Diameter | 0.328 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN |
| Attachment Feature Quantity | 4 |
| Material Document and Classification | MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT |
| Accommodated Shaft Diameter | 2.005 INCHES MINIMUM AND 2.020 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ SEALING ELEMENT |
| Material | ALUMINUM ALLOY 6061 RETAINER |
| Attachment Method | ROUND HOLE |
| 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 |
|---|---|
| 4099057-501 | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
| 870373 | Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa (MEX) |
| Reference | Meaning |
|---|---|
| 17B6D1390-501 | 3/2 Design control — primary reference U.S. Government activity |
| 870373 | 5/2 Secondary reference U.S. Government activity |
| 17B6D13909-501 | 5/9 Secondary reference U.S. Government activity |
| 17B6D1390-501 | 5/2 Secondary reference U.S. Government activity |
NSN 5330-01-425-0131 is a Seal,plain Encased, manufactured by Freudenberg-Nok General Partnership Dba International Seal Co Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-425-0131 has 2 manufacturer part numbers on file: 4099057-501 (Freudenberg-Nok General Partnership Dba International Seal Co Inc), 870373 (Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa).
Key specifications for 4099057-501: Attachment Hole Diameter: 0.328 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN; Attachment Feature Quantity: 4; Material Document and Classification: MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT; Accommodated Shaft Diameter: 2.005 INCHES MINIMUM AND 2.020 INCHES MAXIMUM IN. 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.