The Stem,needle Valve, cataloged under National Stock Number 4820-01-421-9634, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-421-9634 |
| Primary Part Number | 211036894 |
| Item Name | Stem,needle Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Largest Outside Diameter | 1.498 INCHES NOMINAL IN |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Disk Style | FLATTED |
| Material Document and Classification | ASTM B150 ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE |
| Material | COPPER 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 |
|---|---|
| 593-6405216 FIND 17 | Naval Sea Systems Command (USA) |
| 211036894 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF7501-101 FIND 17 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-421-9634 is a Stem,needle Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-9634 has 2 manufacturer part numbers on file: 593-6405216 FIND 17 (Naval Sea Systems Command), 211036894 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-641-0269. Verify interchangeability with system specifications before substitution.
Key specifications for 211036894: Largest Outside Diameter: 1.498 INCHES NOMINAL IN; Stem Actuating End Type: THREADED EXTERNALLY; Disk Style: FLATTED; Material Document and Classification: ASTM B150 ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE. 5 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.