The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-00-779-0180, 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 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-779-0180 |
| Primary Part Number | 3W56260 |
| Item Name | Parts Kit,safety Relief 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 | 10 |
| End Item Source | 88663 |
| Supply Items and Quantities | 88663 PP593 SPRING 1; 88663 XXH6EA GUIDE 1; 88663 XXH4GA SEAT 1; 88663 XX14 SHIM 5; 81168 1820-15 O-RING 1; 88663 XXH3G VALVE 1 |
| End Item Name | SAFETY RELIEF VALVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3W56260 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 3W56260 | 5/9 Secondary reference U.S. Government activity |
| 3W56260 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 3W56260 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 3W56260 | 5/9 Secondary reference Ingersoll Rand Co |
NSN 4820-00-779-0180 is a Parts Kit,safety Relief 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 4820-00-779-0180 has 1 manufacturer part number on file: 3W56260 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 3W56260: Component Quantity: 10; End Item Source: 88663; Supply Items and Quantities: 88663 PP593 SPRING 1; 88663 XXH6EA GUIDE 1; 88663 XXH4GA SEAT 1; 88663 XX14 SHIM 5; 81168 1820-15 O-RING 1; 88663 XXH3G VALVE 1; End Item Name: SAFETY RELIEF VALVE. 4 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.
NSN 4820-00-779-0180 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.