PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2640-801X02 PIECE 5Seat,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-00-799-7060 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-799-7060 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-799-7060. Primary manufacturer part number: 2640-801X02 PIECE 5.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: RADIAL
  • Body Inside Diameter: 1.000 INCHES NOMINAL IN
  • Style Designator: PLAIN
  • Body Outside Diameter: 1.755 INCHES NOMINAL IN
  • Material: PLASTIC POLYAMIDE NYLON OVERALL
  • Seat Radius: 0.375 INCHES NOMINAL IN
  • 33 verified cross-references
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Polyamide Nylon Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-799-7060, 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 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 33 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-799-7060
Primary Part Number2640-801X02 PIECE 5
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusCANCELLED
Seating Surface ShapeRADIAL
Body Inside Diameter1.000 INCHES NOMINAL IN
Style DesignatorPLAIN
Body Outside Diameter1.755 INCHES NOMINAL IN
MaterialPLASTIC POLYAMIDE NYLON OVERALL
Seat Radius0.375 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5940-00-903-1332 INTERCHANGEABLE
Terminal,stud
4820-01-267-5996259089 ITEM 13 AND 14 INTERCHANGEABLE
Parts Kit,ball Valve
Huntington Ingalls Inc Div Newport News Shipbuilding
Cross-Reference Index
Part NumberManufacturer
77791-14X2PC6 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
516-4775902 ITE Naval Sea Systems Command (USA)
2640-403X3PC6 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
SS845-2050999 P Naval Ship Systems Command (USA)
845-2444863PC5 Naval Ship Systems Command (USA)
2640-801X02 PIECE 5 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
72793-25X03PC19 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2050967PC5REVL P J Valves Inc (USA)
71793-25X3PC19 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2640-276X27PC7 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
77791-15X2PC3 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
72791-14X2PC6 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
205120-5 Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
516-4775902 ITEM 27 Naval Sea Systems Command (USA)
9886-345X1PC9 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
72791-32X4PC2 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2640-157PC7 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
9800-317X1PC81 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
9800-322X1-81 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
259089 ITEM 43 Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Related Parts
5940-00-903-1332INTERCHANGEABLE
TERMINAL,STUD
4820-01-267-5996INTERCHANGEABLE
PARTS KIT,BALL VALVE
259089 ITEM 13 AND 14

Frequently Asked Questions

What is NSN 4820-00-799-7060?

NSN 4820-00-799-7060 is a Seat,valve, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-799-7060?

NSN 4820-00-799-7060 has 33 cross-referenced part numbers: 77791-14X2PC6 (Electric Boat Corporation Div General Dynamics Electric Boat), 516-4775902 ITE (Naval Sea Systems Command), 2640-403X3PC6 (Electric Boat Corporation Div General Dynamics Electric Boat), SS845-2050999 P (Naval Ship Systems Command), 845-2444863PC5 (Naval Ship Systems Command) and 28 more.

What NSN replaces 4820-00-799-7060?

There are 2 known substitutes for 4820-00-799-7060: 5940-00-903-1332, 4820-01-267-5996. Verify interchangeability with system specifications before substitution.

What are the specifications of 2640-801X02 PIECE 5?

Key specifications for 2640-801X02 PIECE 5: Seating Surface Shape: RADIAL; Body Inside Diameter: 1.000 INCHES NOMINAL IN; Overall Height: 0.312 INCHES NOMINAL IN; Style Designator: PLAIN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-799-7060 still in active supply?

NSN 4820-00-799-7060 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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