The Seal,plain Encased, cataloged under National Stock Number 5330-00-998-3198, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Zf Industrieantriebe Witten Gmbh. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-998-3198 |
| Primary Part Number | 21856 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Zf Industrieantriebe Witten Gmbh |
| Status | ACTIVE |
| Seal Width | 0.500 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Sealing Element Style | ANGULAR-OPPOSED |
| Housing Bore Diameter | 5.501 INCHES NOMINAL IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 4.375 INCHES NOMINAL IN |
| Material | STEEL 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 |
|---|---|
| 21856 | Zf Industrieantriebe Witten Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 415198H | 5/9 Secondary reference Federal-Mogul Corp Chassis Products Div |
| 416380 | 3/9 Design control — primary reference Federal-Mogul Corp Chassis Products Div |
| 0516805 | 5/9 Secondary reference Dresser Industries Inc Waukesha Engine Div |
NSN 5330-00-998-3198 is a Seal,plain Encased, manufactured by Zf Industrieantriebe Witten Gmbh, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-998-3198 has 1 manufacturer part number on file: 21856 (Zf Industrieantriebe Witten Gmbh).
6 possible matches (shared part number, not a government interchangeability claim): 5815-01-171-1623, 6625-01-204-0391, 6150-01-249-4085. Verify interchangeability with system specifications before substitution.
Key specifications for 21856: Seal Width: 0.500 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN; Sealing Element Style: ANGULAR-OPPOSED; Housing Bore Diameter: 5.501 INCHES NOMINAL IN; Case Style: SQUARE. 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.