PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H553-2002-6Seat,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-01-548-5692 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-548-5692 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-548-5692. Primary manufacturer part number: H553-2002-6.
Features
  • Seat,valve — FSC 4820
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: ITEMS THAT SUPPORT A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
  • 19 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 4820-01-548-5692, 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 19 commercial cross-references from 3 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
NSN4820-01-548-5692
Primary Part NumberH553-2002-6
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsITEMS THAT SUPPORT A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4820-01-488-55422640-801X01 PC 15 INTERCHANGEABLE
Seat,valve
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
H553-2002-6 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
564-7066816-6 Naval Sea Systems Command (USA)
7383858-H5532002-06Q3 Naval Inventory Control Point Mechanicsburg (USA)
H5532002-06 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
H547-0001-H5532002-06Q3 Naval Inventory Control Point Mechanicsburg (USA)
7550479-H5532002-06 Naval Sea Systems Command (USA)
2640-801X01 PC 15Q3 Naval Inventory Control Point Mechanicsburg (USA)
H5532002-06Q3 Naval Inventory Control Point Mechanicsburg (USA)
G547-0003-H5532002-06Q3 Naval Inventory Control Point Mechanicsburg (USA)
G547-0003-H5532002-06 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
7285297 PIECE 15 Naval Sea Systems Command (USA)
564-7066816-6Q3 Naval Inventory Control Point Mechanicsburg (USA)
564-7066816 PN 6 Naval Sea Systems Command (USA)
7383858-H5532002-06 Naval Sea Systems Command (USA)
H547-0001-H5532002-06 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2640-801X01 PC 15 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
H553-2002-6Q3 Naval Inventory Control Point Mechanicsburg (USA)
7550479-H5532002-06Q3 Naval Inventory Control Point Mechanicsburg (USA)
564-7066816 PN 6Q3 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
4820-01-488-5542INTERCHANGEABLE
SEAT,VALVE
2640-801X01 PC 15

Frequently Asked Questions

What is NSN 4820-01-548-5692?

NSN 4820-01-548-5692 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 4820-01-548-5692?

NSN 4820-01-548-5692 has 19 cross-referenced part numbers: H553-2002-6 (Electric Boat Corporation Div General Dynamics Electric Boat), 564-7066816-6 (Naval Sea Systems Command), 7383858-H5532002-06Q3 (Naval Inventory Control Point Mechanicsburg), H5532002-06 (Electric Boat Corporation Div General Dynamics Electric Boat), H547-0001-H5532002-06Q3 (Naval Inventory Control Point Mechanicsburg) and 14 more.

What NSN replaces 4820-01-548-5692?

There is 1 known substitute for 4820-01-548-5692: 4820-01-488-5542. Verify interchangeability with system specifications before substitution.

What are the specifications of H553-2002-6?

Key specifications for H553-2002-6: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: ITEMS THAT SUPPORT A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS. 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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