The Stem,fluid Valve, cataloged under National Stock Number 4820-01-546-9950, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-546-9950 |
| Primary Part Number | 6397434-1CP |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Valve Type for Which Designed | GLOBE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Criticality Code Justification | ZZZY |
| Valve Size for Which Designed | 0.250 INCHES IN |
| Material | COBALT ALLOY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 6397434-1CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 6397434CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 803-6397434-X1XXX3 ITEM NO.96CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 803-6397434-X1XXX3 ITEM NO.96 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 6397434-1 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-546-9950 is a Stem,fluid Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-546-9950 has 3 manufacturer part numbers on file: 6397434-1CP (Naval Inventory Control Point Mechanicsburg), 6397434CP (Naval Inventory Control Point Mechanicsburg), 803-6397434-X1XXX3 ITEM NO.96CP (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-559-3888. Verify interchangeability with system specifications before substitution.
Key specifications for 6397434-1CP: Valve Type for Which Designed: GLOBE; Stem Actuating End Type: THREADED EXTERNALLY; Criticality Code Justification: ZZZY; Valve Size for Which Designed: 0.250 INCHES IN. 6 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.