NSN 4820-01-377-3873 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-377-3873. Manufacturer of record part number: 211068742.
Material Document and Classification: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE
Valve Size for Which Designed: 0.500 INCHES IN
Material: NICKEL ALLOY
2 manufacturer part numbers on file
Identification
NSN: 4820-01-377-3873
NIIN: 013773873
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 211068742
Manufacturer: Naval Sea Systems Command
General Description
The Stem,fluid Valve, cataloged under National Stock Number 4820-01-377-3873, 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 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-377-3873
Primary Part Number
211068742
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Valve Type for Which Designed
BALL
Largest Outside Diameter
1.110 INCHES NOMINAL IN
Stem Actuating End Type
THREADED EXTERNALLY
Material Document and Classification
QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE
Valve Size for Which Designed
0.500 INCHES IN
Material
NICKEL 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 Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-377-3890211055673POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-377-4606211055796POSSIBLE MATCH
LUG,VALVE HANDLE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-6620211081797POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-6622211081781POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-6628211055808POSSIBLE MATCH
CAP,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-8288801-6408784-AY81POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-8290801-6408784-AY78POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-8291801-6408784 FIND 219POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-8292801-6408784 FIND 68POSSIBLE MATCH
CAP,VALVE
Possible match (shared part number)Naval Sea Systems Command
Huntington Ingalls Inc Div Newport News Shipbuilding
6408784
D/9Drawing number reference only
Naval Sea Systems Command
DF330644
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
Related Parts
4820-01-377-3890POSSIBLE MATCH
SEAT,VALVE
211055673
4820-01-377-4606POSSIBLE MATCH
LUG,VALVE HANDLE
211055796
4820-01-415-6620POSSIBLE MATCH
STEM,FLUID VALVE
211081797
4820-01-415-6622POSSIBLE MATCH
VALVE,BALL
211081781
4820-01-415-6628POSSIBLE MATCH
CAP,VALVE
211055808
4820-01-415-8288POSSIBLE MATCH
VALVE,BALL
801-6408784-AY81
4820-01-415-8290POSSIBLE MATCH
VALVE,BALL
801-6408784-AY78
4820-01-415-8291POSSIBLE MATCH
STEM,FLUID VALVE
801-6408784 FIND 219
4820-01-415-8292POSSIBLE MATCH
CAP,VALVE
801-6408784 FIND 68
Frequently Asked Questions
What is NSN 4820-01-377-3873?
NSN 4820-01-377-3873 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 4820-01-377-3873?
NSN 4820-01-377-3873 has 2 manufacturer part numbers on file: 211068742 (Naval Sea Systems Command), 801-6408784-196 (Naval Sea Systems Command).
What NSN replaces 4820-01-377-3873?
9 possible matches (shared part number, not a government interchangeability claim): 4820-01-377-3890, 4820-01-377-4606, 4820-01-415-6620. Verify interchangeability with system specifications before substitution.
What are the specifications of 211068742?
Key specifications for 211068742: Valve Type for Which Designed: BALL; Largest Outside Diameter: 1.110 INCHES NOMINAL IN; Stem Actuating End Type: THREADED EXTERNALLY; Material Document and Classification: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-377-3873 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.