The Seal,plain Encased, cataloged under National Stock Number 5330-00-425-3510, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-00-425-3510 |
| Primary Part Number | M2520 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Seal Width | 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Sealing Element Style | VERTICAL |
| Housing Bore Diameter | 2.499 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 2.125 INCHES NOMINAL IN |
| Material | STEEL CASE |
| Material | RUBBER SYNTHETIC SEALING ELEMENT |
| 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 |
|---|---|
| M2520 PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| Reference | Meaning |
|---|---|
| BR232-208-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5330-00-425-3510 is a Seal,plain Encased, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-425-3510 has 1 manufacturer part number on file: M2520 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
Key specifications for M2520: Seal Width: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Sealing Element Style: VERTICAL; Housing Bore Diameter: 2.499 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN; Case Style: SQUARE. 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.