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NSN 4820-01-476-2001Government record, cited
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Retainer, Seat, Valve4820-01-476-2001

NSN 4820-01-476-2001 · NIIN 014762001 · Part number 845-7286645 ITEM 30
Naval Sea Systems Command · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 53711
Government record, cited
NSN 4820-01-476-2001 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-476-2001. Manufacturer of record part number: 845-7286645 ITEM 30.
Also searched as  4820-01-476-2001 · 4820014762001 · NIIN 014762001 · 01-476-2001 · FSC 4820 Valves, Nonpowered · CAGE 53711 · 845-7286645 ITEM 30 · 2643-820-03 ITEM 30 · 845-7286645
Nearby stock numbers  ·
GATE VALVE PROFILE
4820-01-476-2001 — Valves, Nonpowered
Features
  • Retainer,seat,valve — FSC 4820
  • Valve Design Control Activity: 96169
  • Material: COPPER ALLOY
  • 1 manufacturer part number on file
  • Manufacturer of record: Naval Sea Systems Command
Identification
  • NSN: 4820-01-476-2001
  • NIIN: 014762001
  • FSC: 4820 — Valves, Nonpowered
  • FSG: 48 — Valves
  • Primary part number: 845-7286645 ITEM 30
  • Manufacturer: Naval Sea Systems Command
General Description

The Retainer,seat,valve, cataloged under National Stock Number 4820-01-476-2001, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-476-2001
Primary Part Number845-7286645 ITEM 30
Item NameRetainer,seat,valve
FSC / FSG4820 / 48 — Valves, Nonpowered
ManufacturerNaval Sea Systems Command
StatusACTIVE
Valve Design Control Activity96169
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-478-9171264080102-45CD POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-632-4785845-7286645 ASSY IRE POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-643-2088 POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)
5305-01-684-6167845-7286645-ITEM NO-44 POSSIBLE MATCH
SETSCREW
Possible match (shared part number)Naval Sea Systems Command
5305-01-684-6172845-7286645-ITEM NO-45 POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Naval Sea Systems Command
5340-01-684-9236845-7286645-ITEM NO-55 POSSIBLE MATCH
LEVER,MANUAL CONTROL
Possible match (shared part number)Naval Sea Systems Command
5310-01-684-9757845-7286645-ITEM NO-40 POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Sea Systems Command
Cross-Reference Index
Part NumberManufacturer
845-7286645 ITEM 30 Naval Sea Systems Command (USA)
Reference documents
ReferenceMeaning
2643-820-03 ITEM 30 3/2 Design control — primary reference
U.S. Government activity
845-7286645 D/9 Drawing number reference only
Naval Sea Systems Command
Related Parts
4820-01-478-9171POSSIBLE MATCH
SEAT,VALVE
264080102-45CD
4820-01-632-4785POSSIBLE MATCH
VALVE,BALL
845-7286645 ASSY IRE
4820-01-643-2088POSSIBLE MATCH
RETAINER,SEAT,VALVE
5305-01-684-6167POSSIBLE MATCH
SETSCREW
845-7286645-ITEM NO-44
5305-01-684-6172POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
845-7286645-ITEM NO-45
5340-01-684-9236POSSIBLE MATCH
LEVER,MANUAL CONTROL
845-7286645-ITEM NO-55
5310-01-684-9757POSSIBLE MATCH
WASHER,FLAT
845-7286645-ITEM NO-40

Frequently Asked Questions

What is NSN 4820-01-476-2001?

NSN 4820-01-476-2001 is a Retainer,seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-476-2001?

NSN 4820-01-476-2001 has 1 manufacturer part number on file: 845-7286645 ITEM 30 (Naval Sea Systems Command).

What NSN replaces 4820-01-476-2001?

7 possible matches (shared part number, not a government interchangeability claim): 4820-01-478-9171, 4820-01-632-4785, 4820-01-643-2088. Verify interchangeability with system specifications before substitution.

What are the specifications of 845-7286645 ITEM 30?

Key specifications for 845-7286645 ITEM 30: Valve Design Control Activity: 96169; Material: COPPER ALLOY. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-476-2001 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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