The Seal,plain Encased, cataloged under National Stock Number 5330-00-561-7775, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5330-00-561-7775 |
| Primary Part Number | 8518251 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Temp Rating | 250.0 FAHRENHEIT DEGF |
| Seal Width | 0.312 INCHES NOMINAL IN |
| Sealing Element Style | ANGULAR |
| Housing Bore Diameter | 1.250 INCHES NOMINAL IN |
| Accommodated Shaft Maximum Rated Speed | 1000 FEET PER MINUTE FT |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 0.594 INCHES NOMINAL IN |
| Material | STEEL CASE |
| Material | RUBBER SYNTHETIC 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 |
NSN 5330-00-561-7775 is a Seal,plain Encased, manufactured by Us Army Aviation and Missile Command, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-561-7775 has 2 manufacturer part numbers on file: 8518251 (Us Army Aviation and Missile Command), 51BY79 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc).
1 possible match (shared part number, not a government interchangeability claim): 6130-01-118-7585. Verify interchangeability with system specifications before substitution.
Key specifications for 8518251: Temp Rating: 250.0 FAHRENHEIT DEGF; Seal Width: 0.312 INCHES NOMINAL IN; Sealing Element Style: ANGULAR; Housing Bore Diameter: 1.250 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.