The Seat,reed Valve, cataloged under National Stock Number 4820-01-126-7221, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-126-7221 |
| Primary Part Number | 1W139430 |
| Item Name | Seat,reed Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL O/A,SEAT HAS 12 ARC TYPE SLOTS INTERNALLY,0.125 IN. SLOT W,SLOTS ARE ON 3 DIFFERENT RADIUA,LG OF SLOTS VARY; 0.313 IN. DIA STUD IN CENTER OF SEAT,0.313-24 UNF THD SIZE 1.710 IN. LG,0.510 IN. SEAT THK,2.050 IN. O/A H,2.800 IN. O/A DIA IN |
| 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 |
|---|---|
| 1W139430 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| 1W139430 PRIMARY | Siemens Energy, Inc. Dba Dresser-Rand (USA) |
| 1W139430 | Argo Turboserve Corporation Div Argo Turboserve Corp. (USA) |
| Reference | Meaning |
|---|---|
| H49901PC11 | 5/9 Secondary reference U.S. Government activity |
| 1W139430 | 5/9 Secondary reference U.S. Government activity |
| 34265228 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| H49901PC11 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| H49901PC11 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
NSN 4820-01-126-7221 is a Seat,reed Valve, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-126-7221 has 3 manufacturer part numbers on file: 1W139430 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), 1W139430 (Siemens Energy, Inc. Dba Dresser-Rand), 1W139430 (Argo Turboserve Corporation Div Argo Turboserve Corp.).
Key specifications for 1W139430: General Characteristics Item Description: STEEL O/A,SEAT HAS 12 ARC TYPE SLOTS INTERNALLY,0.125 IN. SLOT W,SLOTS ARE ON 3 DIFFERENT RADIUA,LG OF SLOTS VARY; 0.313 IN. DIA STUD IN CENTER OF SEAT,0.313-24 UNF THD SIZE 1.710 IN. LG,0.510 IN. SEAT THK,2.050 IN. O/A H,2.800 IN. O/A DIA IN. 1 specification is 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.