NSN 4820-01-348-4381 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-348-4381. Manufacturer of record part number: 556-6405334-19.
Body Inside Diameter: 0.562 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
Seat Radius: 0.281 INCHES NOMINAL IN
Material: PLASTIC POLYAMIDE NYLON OVERALL
Seating Surface Shape: RADIAL
2 manufacturer part numbers on file
Identification
NSN: 4820-01-348-4381
NIIN: 013484381
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 556-6405334-19
Manufacturer: Naval Sea Systems Command
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-348-4381, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-348-4381
Primary Part Number
556-6405334-19
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Body Outside Diameter
1.059 INCHES NOMINAL IN
Style Designator
PLAIN
Body Inside Diameter
0.562 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
Seat Radius
0.281 INCHES NOMINAL IN
Material
PLASTIC POLYAMIDE NYLON OVERALL
Seating Surface Shape
RADIAL
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 Items11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-348-6734556-6405334-26POSSIBLE MATCH
STOP,MANUAL CONTROL LEVER
Possible match (shared part number)Naval Sea Systems Command
4820-01-349-7905556-6405334-51POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-375-4563POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)
4820-01-414-4403211080541POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3164211055373POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3165556-6405334-AY70POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3166211055410POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3167211055386/211055410POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3170556-6405334-123POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-429-9922211045560,211036226POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-348-4381 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-348-4381?
NSN 4820-01-348-4381 has 2 manufacturer part numbers on file: 556-6405334-19 (Naval Sea Systems Command), 211036227 (Naval Sea Systems Command).
What NSN replaces 4820-01-348-4381?
11 possible matches (shared part number, not a government interchangeability claim): 4820-01-348-6734, 4820-01-349-7905, 4820-01-375-4563. Verify interchangeability with system specifications before substitution.
What are the specifications of 556-6405334-19?
Key specifications for 556-6405334-19: Overall Height: 0.219 INCHES NOMINAL IN; Body Outside Diameter: 1.059 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 0.562 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-348-4381 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.