NSN 4820-01-358-2558 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-358-2558. Manufacturer of record part number: 803-6397391 PIECE 2.
The Ball,valve,ported, cataloged under National Stock Number 4820-01-358-2558, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-358-2558
Primary Part Number
803-6397391 PIECE 2
Item Name
Ball,valve,ported
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Port Configuration
ANGLE
Stem Accommodation Quantity
1
Port Quantity
2
Material
STEEL CORROSION RESISTING
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-358-2564803-6397390 PIECE 7POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-358-7028803-6397391 PIECE 3POSSIBLE MATCH
BALL,VALVE,PORTED
Possible match (shared part number)Naval Sea Systems Command
4730-01-367-0167803-6397390 PC 1 30 MESHPOSSIBLE MATCH
STRAINER,SEDIMENT
Possible match (shared part number)Naval Sea Systems Command
4820-01-367-2129803-6397390 PIECE 14POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4330-01-371-2671803-6397390 PIECE 16POSSIBLE MATCH
MAGNET ASSEMBLY,FILTER
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-358-2558 is a Ball,valve,ported, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-358-2558?
NSN 4820-01-358-2558 has 2 manufacturer part numbers on file: 803-6397390 PIECE 42 (Naval Sea Systems Command), 803-6397391 PIECE 2 (Naval Sea Systems Command).
What NSN replaces 4820-01-358-2558?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-358-2564, 4820-01-358-7028, 4730-01-367-0167. Verify interchangeability with system specifications before substitution.
What are the specifications of 803-6397391 PIECE 2?
Key specifications for 803-6397391 PIECE 2: Port Configuration: ANGLE; Stem Accommodation Quantity: 1; Port Quantity: 2; Material: STEEL CORROSION RESISTING. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-358-2558 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.