NSN 4820-01-477-9426 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-477-9426. Manufacturer of record part number: 845-7285244 ITEM 49, 52.
The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-477-9426, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-477-9426
Primary Part Number
845-7285244 ITEM 49, 52
Item Name
Parts Kit,ball Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Document Type
INDUSTRIAL DRAWING
Component Document Page Number
7-5 AND 11
Document Identification
845-7285244
Document Source
53711
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 Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-477-94302643-405-01 ITEM 51POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-477-94352643-405-01 ITEM 52POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-480-3117845-7285244 ITEM 44POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-480-3147POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)
4820-01-505-0518POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)
4820-01-626-2778POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)
4820-01-647-3894845-7285244ITEM65POSSIBLE MATCH
VALVE,STOP-CHECK
Possible match (shared part number)Naval Sea Systems Command
4820-01-698-8374POSSIBLE MATCH
INDICATOR,VALVE OPENING
Possible match (shared part number)
4820-01-721-2582845-7285244 ITEM 103POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-721-2594845-7285244 ITEM 110POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-477-9426 is a Parts Kit,ball Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-477-9426?
NSN 4820-01-477-9426 has 1 manufacturer part number on file: 845-7285244 ITEM 49, 52 (Naval Sea Systems Command).
What NSN replaces 4820-01-477-9426?
10 possible matches (shared part number, not a government interchangeability claim): 4820-01-477-9430, 4820-01-477-9435, 4820-01-480-3117. Verify interchangeability with system specifications before substitution.
What are the specifications of 845-7285244 ITEM 49, 52?
Key specifications for 845-7285244 ITEM 49, 52: Document Type: INDUSTRIAL DRAWING; Component Document Page Number: 7-5 AND 11; Document Identification: 845-7285244; Document Source: 53711. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-477-9426 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.