The Stem,fluid Valve, cataloged under National Stock Number 4820-01-506-4086, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-506-4086 |
| Primary Part Number | 803-4384536-3XXX-90 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Type for Which Designed | STOP-CHECK |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Material Document and Classification | ASTM 164 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-N-281 MIL SPEC SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 0.5000 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 |
|---|---|
| 803-4384536-3XXX-90 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 4384536 | D/9 Drawing number reference only U.S. Government activity |
| 803-4384536-3XXX-90 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-506-4086 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-506-4086 has 1 manufacturer part number on file: 803-4384536-3XXX-90 (Naval Sea Systems Command).
Key specifications for 803-4384536-3XXX-90: Valve Type for Which Designed: STOP-CHECK; Stem Actuating End Type: THREADED EXTERNALLY; Material Document and Classification: ASTM 164 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-N-281 MIL SPEC SINGLE MATERIAL RESPONSE; Overall Length: 4.4531 INCHES NOMINAL IN. 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.