The Seat,valve, cataloged under National Stock Number 4820-00-075-0364, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-075-0364 |
| Primary Part Number | 20019P |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.188 INCHES NOMINAL IN |
| Flange Diameter | 4.375 INCHES NOMINAL IN |
| Body Outside Diameter | 4.344 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 4.031 INCHES NOMINAL IN |
| Under Flange Height | 1.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 20019P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Y-122451 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 10008 PRIMARY | Rps-Fl, Inc. Dba Rps Inc (USA) |
| Reference | Meaning |
|---|---|
| Y-122451 | 5/9 Secondary reference U.S. Government activity |
| 20019P | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-075-0364 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-075-0364 has 3 manufacturer part numbers on file: 20019P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), Y-122451 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 10008 (Rps-Fl, Inc. Dba Rps Inc).
Key specifications for 20019P: Flange Seat to Disk End Height: 0.188 INCHES NOMINAL IN; Flange Diameter: 4.375 INCHES NOMINAL IN; Body Outside Diameter: 4.344 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 8 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.