The Seal,plain Encased, cataloged under National Stock Number 5330-01-445-5680, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-445-5680 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Status | ACTIVE |
| Operating Medium | FUEL, AVIATION |
| Seal Width | 0.312 INCHES NOMINAL IN |
| Sealing Element Style | ANGULAR-OPPOSED |
| Outside Diameter | 2.129 INCHES NOMINAL IN |
| Housing Bore Diameter | 2.125 INCHES NOMINAL IN |
| Case Style | RECESSED |
| Accommodated Shaft Diameter | 1.500 INCHES NOMINAL IN |
| Surface Treatment | PLASTIC CASE |
| Material | RUBBER BUTADIENE NITRILE 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 |
| Reference | Meaning |
|---|---|
| 440356 | 7/1 Vendor item drawing reference Drs Environmental Systems Inc |
| 14876 | 3/2 Design control — primary reference U.S. Government activity |
| 440356 | 7/9 Vendor item drawing reference U.S. Government activity |
NSN 5330-01-445-5680 is a Seal,plain Encased, classified under FSC 5330, Packing and Gasket Materials. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3110-01-549-1353, 5305-01-672-8811. Verify interchangeability with system specifications before substitution.
Key specifications for 5330-01-445-5680: Operating Medium: FUEL, AVIATION; Seal Width: 0.312 INCHES NOMINAL IN; Sealing Element Style: ANGULAR-OPPOSED; Outside Diameter: 2.129 INCHES NOMINAL IN. 9 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.