The Valve Assembly,manifold, cataloged under National Stock Number 4820-01-525-4407, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-525-4407 |
| Primary Part Number | H594-2280-383 ASSY 98 |
| Item Name | Valve Assembly,manifold |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Valve Quantity | 3 |
| Furnished Items and Quantity | 3 HANDWHEEL |
| Operating Pressure and Type | 100.0 POUNDS PER SQUARE INCH (PSI) LIQUID MAXIMUM REQUIRED LBS |
| Connection Type | FLANGE, ROUND W/HOLES |
| End Connection Quantity | 4 |
| Valve Size | 2.500 INCHES IN |
| Body Material | NICKEL ALLOY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| H594-2280-383 ASSY 98 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 508-4324005 ASSY 98 | 3/2 Design control — primary reference U.S. Government activity |
| 4324005 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-525-4407 is a Valve Assembly,manifold, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-525-4407 has 1 manufacturer part number on file: H594-2280-383 ASSY 98 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-656-0988. Verify interchangeability with system specifications before substitution.
Key specifications for H594-2280-383 ASSY 98: Valve Quantity: 3; Furnished Items and Quantity: 3 HANDWHEEL; Operating Pressure and Type: 100.0 POUNDS PER SQUARE INCH (PSI) LIQUID MAXIMUM REQUIRED LBS; Connection Type: FLANGE, ROUND W/HOLES. 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.