The Stem,fluid Valve, cataloged under National Stock Number 4820-01-421-8146, 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 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-421-8146 |
| Primary Part Number | 803-6397434-X61XX1-076 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 DISK AND 1 RETAINER AND 1 LOCKNUT AND 1 NUT |
| Valve Type for Which Designed | GLOBE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Material Document and Classification | MIL-C-24252 COMP 1 COND CA-7 MIL SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | THREADED |
| Valve Size for Which Designed | 2.000 INCHES IN |
| Material | COBALT 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 |
|---|---|
| 803-6397434-X61XX1 ITEM 76 | Naval Sea Systems Command (USA) |
| 803-6397434-X61XX1-076 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-421-8146 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-8146 has 2 manufacturer part numbers on file: 803-6397434-X61XX1 ITEM 76 (Naval Sea Systems Command), 803-6397434-X61XX1-076 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-422-0543. Verify interchangeability with system specifications before substitution.
Key specifications for 803-6397434-X61XX1-076: Furnished Items and Quantity: 1 DISK AND 1 RETAINER AND 1 LOCKNUT AND 1 NUT; Valve Type for Which Designed: GLOBE; Stem Actuating End Type: THREADED EXTERNALLY; Material Document and Classification: MIL-C-24252 COMP 1 COND CA-7 MIL SPEC SINGLE MATERIAL RESPONSE. 7 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.