The Stem,fluid Valve, cataloged under National Stock Number 4820-01-420-4137, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-420-4137 |
| Primary Part Number | W5520SW 2.00IN IT4 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Valve Type for Which Designed | GLOBE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Valve Size for Which Designed | 2.000 INCHES IN |
| Material | CHROMIUM ALLOY |
| 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 |
|---|---|
| W5520SW 2.00IN IT4 PRIMARY | The Walworth Company (USA) |
| W5520SW 2.00IN IT4 | Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of (USA) |
NSN 4820-01-420-4137 is a Stem,fluid Valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-420-4137 has 2 manufacturer part numbers on file: W5520SW 2.00IN IT4 (The Walworth Company), W5520SW 2.00IN IT4 (Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of).
Key specifications for W5520SW 2.00IN IT4: Valve Type for Which Designed: GLOBE; Stem Actuating End Type: THREADED EXTERNALLY; Valve Size for Which Designed: 2.000 INCHES IN; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 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.
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.