PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3203558/PC10Seat,valve

Naval Ship Systems Command · NSN 4820-01-266-8771 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-266-8771 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-266-8771. Primary manufacturer part number: 3203558/PC10.
Features
  • Seat,valve — FSC 4820
  • Material: COPPER ALLOY OVERALL
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
  • Criticality Code Justification: ZZZY
  • 3 verified cross-references
  • Primary manufacturer: Naval Ship Systems Command
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-266-8771, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Ship Systems Command. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-266-8771
Primary Part Number3203558/PC10
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusACTIVE
MaterialCOPPER ALLOY OVERALL
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4820-01-417-6693D-1660-VH INTERCHANGEABLE
Disk,valve
Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash
Cross-Reference Index
Part NumberManufacturer
3203558/PC10 Naval Ship Systems Command (USA)
D-1660-VH Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash (USA)
AA-397PC10 Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash (USA)
Related Parts
4820-01-417-6693INTERCHANGEABLE
DISK,VALVE
D-1660-VH

Frequently Asked Questions

What is NSN 4820-01-266-8771?

NSN 4820-01-266-8771 is a Seat,valve, manufactured by Naval Ship Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-266-8771?

NSN 4820-01-266-8771 has 3 cross-referenced part numbers: 3203558/PC10 (Naval Ship Systems Command), D-1660-VH (Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash), AA-397PC10 (Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash).

What NSN replaces 4820-01-266-8771?

There is 1 known substitute for 4820-01-266-8771: 4820-01-417-6693. Verify interchangeability with system specifications before substitution.

What are the specifications of 3203558/PC10?

Key specifications for 3203558/PC10: Material: COPPER ALLOY OVERALL; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS; Criticality Code Justification: ZZZY. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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