The Stem,fluid Valve, cataloged under National Stock Number 4820-01-537-8429, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-537-8429 |
| Primary Part Number | 801-6405342 FIND 42 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Type for Which Designed | BALL |
| Stem Actuating End Type | SQUARE |
| Valve Size for Which Designed | 0.500 INCHES IN |
| Material | NICKEL 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 |
|---|---|
| DF330707 ITEM 42 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 801-6405342 FIND 42 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211041870 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-537-8429 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-537-8429 has 2 manufacturer part numbers on file: DF330707 ITEM 42 (Huntington Ingalls Inc Div Newport News Shipbuilding), 801-6405342 FIND 42 (Naval Sea Systems Command).
Key specifications for 801-6405342 FIND 42: Valve Type for Which Designed: BALL; Stem Actuating End Type: SQUARE; Overall Length: 4.040 INCHES NOMINAL IN; Valve Size for Which Designed: 0.500 INCHES IN. 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.