The Seal,plain Encased, cataloged under National Stock Number 5330-01-391-3568, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-391-3568 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Status | ACTIVE |
| Seal Width | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Sealing Element Style | VERTICAL |
| Housing Bore Diameter | 5.002 INCHES MINIMUM AND 5.006 INCHES MAXIMUM IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 3.750 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM CASE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| BAC-S11B-31L12 | 3/2 Design control — primary reference U.S. Government activity |
| 45031-L-12 | 5/9 Secondary reference U.S. Government activity |
| 45031S | 5/9 Secondary reference Federal-Mogul Corp Government Sales Dept |
| 45031S | 5/9 Secondary reference U.S. Government activity |
NSN 5330-01-391-3568 is a Seal,plain Encased, classified under FSC 5330, Packing and Gasket Materials. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6695-01-450-7275. Verify interchangeability with system specifications before substitution.
Key specifications for 5330-01-391-3568: Seal Width: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Sealing Element Style: VERTICAL; Housing Bore Diameter: 5.002 INCHES MINIMUM AND 5.006 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.