NSN 4820-01-063-1934 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-063-1934. Manufacturer of record part number: 810-2178493 PIECE 6.
The Stem,fluid Valve, cataloged under National Stock Number 4820-01-063-1934, 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 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-063-1934
Primary Part Number
810-2178493 PIECE 6
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Valve Type for Which Designed
BALL
Valve Size for Which Designed
3.000 INCHES IN
Material
COPPER ALLOY
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-087-00022640-649 4IN PC10POSSIBLE MATCH
PLUG,ROTARY,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-094-1930810-2178493 PIECE 9POSSIBLE MATCH
STOP POSITION INDICATOR
Possible match (shared part number)Naval Ship Systems Command
4820-01-104-4126POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
5340-01-108-0277810-2178493-A-23POSSIBLE MATCH
HANDWHEEL
Possible match (shared part number)Naval Ship Systems Command
4820-01-111-4603810-2178493 ASSYA/DS SWCH INDPOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Ship Systems Command
4820-01-331-6890POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
4820-01-407-7539803-2178493 PIECE 1,2POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Ship Systems Command
NSN 4820-01-063-1934 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-063-1934?
NSN 4820-01-063-1934 has 1 manufacturer part number on file: 810-2178493 PIECE 6 (Naval Sea Systems Command).
What NSN replaces 4820-01-063-1934?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-087-0002, 4820-01-094-1930, 4820-01-104-4126. Verify interchangeability with system specifications before substitution.
What are the specifications of 810-2178493 PIECE 6?
Key specifications for 810-2178493 PIECE 6: Valve Type for Which Designed: BALL; Overall Length: 6.344 INCHES NOMINAL IN; Valve Size for Which Designed: 3.000 INCHES IN; Material: COPPER ALLOY. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-063-1934 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.