The Seal,plain Encased, cataloged under National Stock Number 5330-00-641-2177, 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 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-641-2177 |
| Primary Part Number | M226 |
| 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 | 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Sealing Element Style | ANGULAR |
| Housing Bore Diameter | 3.350 INCHES NOMINAL IN |
| Accommodated Shaft Maximum Rated Speed | 2000 FEET PER MINUTE FT |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 2.312 INCHES NOMINAL IN |
| Material | LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT |
| Material | STEEL 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 |
|---|---|
| 50100 | Federal-Mogul Corp Government Sales Dept (USA) |
| M226 PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| Reference | Meaning |
|---|---|
| M226 | 5/9 Secondary reference Barber-Greene Co |
| 335210 | 5/9 Secondary reference U.S. Government activity |
| M226 | C/1 Advisory reference — outside the item-of-supply concept Minnpar, Llc Dba Minnpar |
| HM74 | 5/9 Secondary reference Link-Belt Cranes, L.p., Lllp |
NSN 5330-00-641-2177 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 5330-00-641-2177 has 2 manufacturer part numbers on file: 50100 (Federal-Mogul Corp Government Sales Dept), M226 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
1 possible match (shared part number, not a government interchangeability claim): 6650-01-433-8042. Verify interchangeability with system specifications before substitution.
Key specifications for M226: Seal Width: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Sealing Element Style: ANGULAR; Housing Bore Diameter: 3.350 INCHES NOMINAL IN; Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT. 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.