The Seal,plain Encased, cataloged under National Stock Number 5330-01-062-6489, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is John Crane, Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-01-062-6489 |
| Primary Part Number | 250-312-8L |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| Temp Rating | 200.0 FAHRENHEIT DEGF |
| Seal Width | 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN |
| Sealing Element Style | ANGULAR-OPPOSED |
| Housing Bore Diameter | 3.128 INCHES MINIMUM AND 3.132 INCHES MAXIMUM IN |
| Accommodated Shaft Maximum Rated Speed | 2000 FEET PER MINUTE FT |
| Case Style | RECESSED |
| Accommodated Shaft Diameter | 2.500 INCHES NOMINAL IN |
| Surface Treatment | ZINC CASE |
| Material | STEEL CORROSION RESISTING CASE |
| Material | RUBBER SYNTHETIC SEALING ELEMENT A |
| Material | RUBBER SYNTHETIC SEALING ELEMENT B |
| 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 |
|---|---|
| 250-312-8L PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| 2097666PIECE74 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5330-01-062-6489 is a Seal,plain Encased, manufactured by John Crane, Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-062-6489 has 1 manufacturer part number on file: 250-312-8L (John Crane, Inc).
Key specifications for 250-312-8L: Temp Rating: 200.0 FAHRENHEIT DEGF; Seal Width: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN; Sealing Element Style: ANGULAR-OPPOSED; Housing Bore Diameter: 3.128 INCHES MINIMUM AND 3.132 INCHES MAXIMUM IN. 11 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.