The Parts Kit,valve, cataloged under National Stock Number 4820-01-128-1918, 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 2 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-128-1918 |
| Primary Part Number | 1W139311 |
| Item Name | Parts Kit,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 |
| Component Quantity | 6 |
| Nonsupply Items and Quantities | SEAT PLATE 2; REED PLATE 2; LOCK RING 2 |
| 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 |
|---|---|
| 1W139311 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| MLH49901G1 | D/9 Drawing number reference only U.S. Government activity |
| MLH49901G1 PIECE 6 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| MLH49901G1 PIECE 6 | 5/9 Secondary reference U.S. Government activity |
| 34265090 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 1W139311 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 1W139311 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 1W139311 | 5/9 Secondary reference U.S. Government activity |
| MLH49901G1 PIECE 6 | 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 4820-01-128-1918 is a Parts Kit,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 4820-01-128-1918 has 1 manufacturer part number on file: 1W139311 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 1W139311: Component Quantity: 6; Nonsupply Items and Quantities: SEAT PLATE 2; REED PLATE 2; LOCK RING 2. 2 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.