The Seat,valve, cataloged under National Stock Number 4820-01-207-5214, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-207-5214 |
| Primary Part Number | RD37058 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.502 INCHES NOMINAL IN |
| Flange Diameter | 2.165 INCHES NOMINAL IN |
| FSC Application Data | MISCELLANEOUS ENGINE ACCESSORIES,AIRCRAFT |
| Body Outside Diameter | 0.807 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.545 INCHES NOMINAL IN |
| Under Flange Height | 0.536 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| RD37058 PRIMARY | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA) |
| Reference | Meaning |
|---|---|
| RD37058 | 5/9 Secondary reference Tim Tusing Enterprises, Inc. |
| RD37058 | 5/9 Secondary reference General Electric Company |
NSN 4820-01-207-5214 is a Seat,valve, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-207-5214 has 1 manufacturer part number on file: RD37058 (Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec).
Key specifications for RD37058: Flange Seat to Disk End Height: 0.502 INCHES NOMINAL IN; Flange Diameter: 2.165 INCHES NOMINAL IN; FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,AIRCRAFT; Body Outside Diameter: 0.807 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.