The Seat,valve, cataloged under National Stock Number 4820-01-029-9974, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 10 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-029-9974 |
| Primary Part Number | 6021328-001 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 1.855 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN |
| Flange Diameter | 4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN |
| Body Outside Diameter | 3.180 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-S-763,CL 410,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Seat Radius | 0.180 INCHES NOMINAL IN |
| Under Flange Height | 1.720 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 6021328-001 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 6021328-001 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 3009G73 PIECE 1 | 5/9 Secondary reference General Electric Company |
| 781E733P41 | 5/9 Secondary reference General Electric Company |
| 3009G73-001 | C/1 Advisory reference — outside the item-of-supply concept General Electric Company |
| 003009G73-1 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
NSN 4820-01-029-9974 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-029-9974 has 1 manufacturer part number on file: 6021328-001 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for 6021328-001: Flange Seat to Disk End Height: 1.855 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN; Flange Diameter: 4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN; Body Outside Diameter: 3.180 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 10 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.