PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2620-908X2Seat,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-00-061-5991 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-061-5991 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-061-5991. Primary manufacturer part number: 2620-908X2.
Features
  • Seat,valve — FSC 4820
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY ASSEMBLY D-10
  • 4 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 4820-00-061-5991, 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 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-061-5991
Primary Part Number2620-908X2
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY ASSEMBLY D-10
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4820-00-061-5985 INTERCHANGEABLE
Seat,valve
4820-00-061-5987 INTERCHANGEABLE
Gland Assembly,valve
4820-00-062-0136 INTERCHANGEABLE
Gland Assembly,valve
4820-00-062-0137 INTERCHANGEABLE
Gland Assembly,valve
5815-00-314-130375433 INTERCHANGEABLE
Bracket
Telemechanics Inc
5306-00-576-694775433 INTERCHANGEABLE
Bolt,shoulder
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
4810-01-422-2853155-008 INTERCHANGEABLE
Valve,solenoid
Snowbird Technologies Inc.
6685-01-442-4911155008 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
5340-01-458-061275433 INTERCHANGEABLE
Hardware Kit,mechanic Equipment
Tyco Fire Products Lp
Cross-Reference Index
Part NumberManufacturer
2620-908X2 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
155008 Eaton Corporation Dba Eaton Inoac Div Eaton (USA)
C54417PC2 Eaton Corporation Dba Eaton Inoac Div Eaton (USA)
75433 Eaton Corporation Dba Eaton Inoac Div Eaton (USA)
Related Parts
4820-00-061-5985INTERCHANGEABLE
SEAT,VALVE
4820-00-061-5987INTERCHANGEABLE
GLAND ASSEMBLY,VALVE
4820-00-062-0136INTERCHANGEABLE
GLAND ASSEMBLY,VALVE
4820-00-062-0137INTERCHANGEABLE
GLAND ASSEMBLY,VALVE
5815-00-314-1303INTERCHANGEABLE
BRACKET
75433
5306-00-576-6947INTERCHANGEABLE
BOLT,SHOULDER
75433
4810-01-422-2853INTERCHANGEABLE
VALVE,SOLENOID
155-008
6685-01-442-4911INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
155008
5340-01-458-0612INTERCHANGEABLE
HARDWARE KIT,MECHANIC EQUIPMENT
75433

Frequently Asked Questions

What is NSN 4820-00-061-5991?

NSN 4820-00-061-5991 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 4820-00-061-5991?

NSN 4820-00-061-5991 has 4 cross-referenced part numbers: 2620-908X2 (Electric Boat Corporation Div General Dynamics Electric Boat), 155008 (Eaton Corporation Dba Eaton Inoac Div Eaton), C54417PC2 (Eaton Corporation Dba Eaton Inoac Div Eaton), 75433 (Eaton Corporation Dba Eaton Inoac Div Eaton).

What NSN replaces 4820-00-061-5991?

There are 9 known substitutes for 4820-00-061-5991: 4820-00-061-5985, 4820-00-061-5987, 4820-00-062-0136 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2620-908X2?

Key specifications for 2620-908X2: Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY ASSEMBLY D-10. 1 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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