NSN 4820-01-348-4440 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-348-4440. Manufacturer of record part number: 752-6405258-47.
The Cap,valve, cataloged under National Stock Number 4820-01-348-4440, 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-348-4440
Primary Part Number
752-6405258-47
Item Name
Cap,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Outside Diameter
1.250 INCHES NOMINAL 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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3020-01-348-80726405258-42POSSIBLE MATCH
GEAR,BEVEL
Possible match (shared part number)Naval Sea Systems Command
3020-01-348-8073752-6405258-38POSSIBLE MATCH
GEAR,HELICAL
Possible match (shared part number)Naval Sea Systems Command
3020-01-348-80746405258-40POSSIBLE MATCH
GEAR,HELICAL
Possible match (shared part number)Naval Sea Systems Command
3020-01-349-7418752-6405258-39POSSIBLE MATCH
GEAR,HELICAL
Possible match (shared part number)Naval Sea Systems Command
3040-01-349-78916405258-41POSSIBLE MATCH
GEARSHAFT,BEVEL
Possible match (shared part number)Naval Sea Systems Command
2010-01-361-6012752-6405258-43POSSIBLE MATCH
SLEEVE,PROPULSION SHAFT,SHIP
Possible match (shared part number)Naval Sea Systems Command
3020-01-378-60366405258-196POSSIBLE MATCH
GEAR,BEVEL
Possible match (shared part number)Naval Sea Systems Command
3040-01-383-56966405258-201POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Reference documents
Reference
Meaning
6405258
D/9Drawing number reference only
Naval Sea Systems Command
DF1706-347
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
Related Parts
3020-01-348-8072POSSIBLE MATCH
GEAR,BEVEL
6405258-42
3020-01-348-8073POSSIBLE MATCH
GEAR,HELICAL
752-6405258-38
3020-01-348-8074POSSIBLE MATCH
GEAR,HELICAL
6405258-40
3020-01-349-7418POSSIBLE MATCH
GEAR,HELICAL
752-6405258-39
3040-01-349-7891POSSIBLE MATCH
GEARSHAFT,BEVEL
6405258-41
2010-01-361-6012POSSIBLE MATCH
SLEEVE,PROPULSION SHAFT,SHIP
752-6405258-43
3020-01-378-6036POSSIBLE MATCH
GEAR,BEVEL
6405258-196
3040-01-383-5696POSSIBLE MATCH
SHAFT,SHOULDERED
6405258-201
Frequently Asked Questions
What is NSN 4820-01-348-4440?
NSN 4820-01-348-4440 is a Cap,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-348-4440?
NSN 4820-01-348-4440 has 2 manufacturer part numbers on file: 752-6405258-47 (Naval Sea Systems Command), DF1706-347-47 (Huntington Ingalls Inc Div Newport News Shipbuilding).
What NSN replaces 4820-01-348-4440?
8 possible matches (shared part number, not a government interchangeability claim): 3020-01-348-8072, 3020-01-348-8073, 3020-01-348-8074. Verify interchangeability with system specifications before substitution.
What are the specifications of 752-6405258-47?
Key specifications for 752-6405258-47: Outside Diameter: 1.250 INCHES NOMINAL IN; Special Features: FOR CHECK VALVE; Material: NICKEL ALLOY. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-348-4440 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.