The Seal,plain Encased, cataloged under National Stock Number 5330-01-276-1663, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-276-1663 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF |
| Seal Width | 0.313 INCHES NOMINAL IN |
| Sealing Element Style | VERTICAL |
| Outside Diameter | 2.506 INCHES NOMINAL IN |
| Housing Bore Diameter | 2.502 INCHES NOMINAL IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 1.875 INCHES NOMINAL IN |
| Surface Treatment | PLASTIC CASE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT |
| Material | STEEL SPRING |
| 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 |
| Reference | Meaning |
|---|---|
| 18565 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5330-01-276-1663 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): 5330-01-298-3097, 6240-01-352-0439. Verify interchangeability with system specifications before substitution.
Key specifications for 5330-01-276-1663: Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF; Seal Width: 0.313 INCHES NOMINAL IN; Sealing Element Style: VERTICAL; Outside Diameter: 2.506 INCHES NOMINAL IN. 11 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.