The Seal,plain Encased, cataloged under National Stock Number 5330-00-174-4257, 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 5 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-00-174-4257 |
| Primary Part Number | CB191-23 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| Seal Width | 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN |
| Sealing Element Style | ANGULAR |
| Housing Bore Diameter | 1.751 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 0.999 INCHES MINIMUM AND 1.001 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 65850-05113-103 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| CB-191-23 | Trelleborg Sealing Solutions Us, Inc. (USA) |
| CB191-23 PRIMARY | John Crane, Inc (USA) |
| CB191-23 | Vanseal Corp (USA) |
| 65850-05113 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| CB-191-23 | 5/9 Secondary reference Trellborg Somersworth |
NSN 5330-00-174-4257 is a Seal,plain Encased, manufactured by John Crane, Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-174-4257 has 5 manufacturer part numbers on file: 65850-05113-103 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), CB-191-23 (Trelleborg Sealing Solutions Us, Inc.), CB191-23 (John Crane, Inc), CB191-23 (Vanseal Corp), 65850-05113 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for CB191-23: Seal Width: 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN; Sealing Element Style: ANGULAR; Housing Bore Diameter: 1.751 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN; Case Style: SQUARE. 5 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.