The Seal,plain Encased, cataloged under National Stock Number 5330-01-306-4872, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Vanseal Corp. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-306-4872 |
| Primary Part Number | 175-250-12-03EH51 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Vanseal Corp |
| Status | ACTIVE |
| Seal Width | 0.375 INCHES NOMINAL IN |
| Sealing Element Style | VERTICAL |
| Housing Bore Diameter | 2.500 INCHES NOMINAL IN |
| Material Document and Classification | AISI 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | QQ-A-250/8 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-200/4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-250/6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-200/5 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-250/7 FED SPEC 3RD MATERIAL RESPONSE CASE |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 1.750 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT |
| Material | STEEL CORROSION RESISTING SPRING |
| Material | ALUMINUM ALLOY 5052 OR ALUMINUM ALLOY 5083 OR ALUMINUM ALLOY 5086 CASE |
| 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 |
|---|---|
| 5428876-9 | Goriziane Group Spa (ITA) |
| 175-250-12-03EH51 PRIMARY | Vanseal Corp (USA) |
| 5428876-9 PRIMARY | Trelleborg Sealing Solutions Us, Inc. (USA) |
| 175-250-12-03EH51 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| 5428876-9 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
| 752-5944481 PIECE 18 | C/1 Advisory reference — outside the item-of-supply concept Westinghouse Electric Corp Machinery Technology Div |
| 0242-31720-00 | 5/9 Secondary reference U.S. Government activity |
| 752-5944481-18 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 5-01750-02500-012-11CW21 | C/1 Advisory reference — outside the item-of-supply concept Vanseal Corp |
| 175-250-12-038851 | 5/9 Secondary reference John Crane, Inc |
| 5428876-9 | 5/9 Secondary reference Trellborg Somersworth |
NSN 5330-01-306-4872 is a Seal,plain Encased, manufactured by Vanseal Corp, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-306-4872 has 4 manufacturer part numbers on file: 5428876-9 (Goriziane Group Spa), 175-250-12-03EH51 (Vanseal Corp), 5428876-9 (Trelleborg Sealing Solutions Us, Inc.), 175-250-12-03EH51 (John Crane, Inc).
Key specifications for 175-250-12-03EH51: Seal Width: 0.375 INCHES NOMINAL IN; Sealing Element Style: VERTICAL; Housing Bore Diameter: 2.500 INCHES NOMINAL IN; Material Document and Classification: AISI 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE SPRING. 10 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.