PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2640-825X60PC3Seat,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-00-411-2699 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-411-2699 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-411-2699. Primary manufacturer part number: 2640-825X60PC3.
Features
  • Seat,valve — FSC 4820
  • Reference Number Differentiating Characteristics: ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
  • Criticality Code Justification: ZZZY
  • 7 verified cross-references
  • Primary manufacturer: Electric Boat Corporation Div General Dynamics Electric Boat
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-411-2699, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Electric Boat Corporation Div General Dynamics Electric Boat. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-411-2699
Primary Part Number2640-825X60PC3
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Reference Number Differentiating CharacteristicsITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-866-8637 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-348-1730 INTERCHANGEABLE
Nut,self-Locking,hexagon
Cross-Reference Index
Part NumberManufacturer
2640-825X60PC3 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2640-801X3 PIECE 11Q3 Naval Inventory Control Point Mechanicsburg (USA)
2640-801X3PC4Q3 Naval Inventory Control Point Mechanicsburg (USA)
2640-801X3PC4 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
845-4775991 ITEM 12Q3 Naval Inventory Control Point Mechanicsburg (USA)
2640-825X60PC3Q3 Naval Inventory Control Point Mechanicsburg (USA)
845-4775991 ITEM 12 Naval Sea Systems Command (USA)
Related Parts
5310-00-866-8637INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-348-1730INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON

Frequently Asked Questions

What is NSN 4820-00-411-2699?

NSN 4820-00-411-2699 is a Seat,valve, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-411-2699?

NSN 4820-00-411-2699 has 7 cross-referenced part numbers: 2640-825X60PC3 (Electric Boat Corporation Div General Dynamics Electric Boat), 2640-801X3 PIECE 11Q3 (Naval Inventory Control Point Mechanicsburg), 2640-801X3PC4Q3 (Naval Inventory Control Point Mechanicsburg), 2640-801X3PC4 (Electric Boat Corporation Div General Dynamics Electric Boat), 845-4775991 ITEM 12Q3 (Naval Inventory Control Point Mechanicsburg) and 2 more.

What NSN replaces 4820-00-411-2699?

There are 2 known substitutes for 4820-00-411-2699: 5310-00-866-8637, 5310-01-348-1730. Verify interchangeability with system specifications before substitution.

What are the specifications of 2640-825X60PC3?

Key specifications for 2640-825X60PC3: Reference Number Differentiating Characteristics: ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS; Criticality Code Justification: ZZZY. 2 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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