PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2620-927X2 ITEM 26Clapper Assembly,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-01-273-3698 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-273-3698 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-273-3698. Primary manufacturer part number: 2620-927X2 ITEM 26.
Features
  • Clapper Assembly,valve — FSC 4820
  • General Characteristics Item Description: CONSISTS OF A GUN METAL CLAPPER,A SOUND DAMPENING BUMPER,A MONEL BUMPER RETAINING NUT,A MONEL BUMPER RETAINING SCREW,A CLAPPER PIN,2 CLAPPER PIN BUSHINGS,2 SOUND DAMPENING BUSHING,A CLAPPER SEAL AND 2 BRASS RETAINING RINGS
  • 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 Clapper Assembly,valve, cataloged under National Stock Number 4820-01-273-3698, 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-273-3698
Primary Part Number2620-927X2 ITEM 26
Item NameClapper Assembly,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF A GUN METAL CLAPPER,A SOUND DAMPENING BUMPER,A MONEL BUMPER RETAINING NUT,A MONEL BUMPER RETAINING SCREW,A CLAPPER PIN,2 CLAPPER PIN BUSHINGS,2 SOUND DAMPENING BUSHING,A CLAPPER SEAL AND 2 BRASS RETAINING RINGS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4820-01-058-2364 INTERCHANGEABLE
Retainer,cover,valve
4820-01-058-4351 INTERCHANGEABLE
Cover,valve
4820-01-099-607990039 INTERCHANGEABLE
Valve,check
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-131-59082620-927X2 ASSEMBLY 6GA INTERCHANGEABLE
Valve,check
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
SS845-2110236 ITEM 26 Naval Ship Systems Command (USA)
SS845-2110236 Naval Ship Systems Command (USA)
2620-927X2 ITEM 26 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2621-927-02 ITE Electric Boat Corporation Div General Dynamics Electric Boat (USA)
Related Parts
4820-01-058-2364INTERCHANGEABLE
RETAINER,COVER,VALVE
4820-01-058-4351INTERCHANGEABLE
COVER,VALVE
4820-01-099-6079INTERCHANGEABLE
VALVE,CHECK
90039
4820-01-131-5908INTERCHANGEABLE
VALVE,CHECK
2620-927X2 ASSEMBLY 6GA

Frequently Asked Questions

What is NSN 4820-01-273-3698?

NSN 4820-01-273-3698 is a Clapper Assembly,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 4820-01-273-3698?

NSN 4820-01-273-3698 has 4 cross-referenced part numbers: SS845-2110236 ITEM 26 (Naval Ship Systems Command), SS845-2110236 (Naval Ship Systems Command), 2620-927X2 ITEM 26 (Electric Boat Corporation Div General Dynamics Electric Boat), 2621-927-02 ITE (Electric Boat Corporation Div General Dynamics Electric Boat).

What NSN replaces 4820-01-273-3698?

There are 4 known substitutes for 4820-01-273-3698: 4820-01-058-2364, 4820-01-058-4351, 4820-01-099-6079 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2620-927X2 ITEM 26?

Key specifications for 2620-927X2 ITEM 26: General Characteristics Item Description: CONSISTS OF A GUN METAL CLAPPER,A SOUND DAMPENING BUMPER,A MONEL BUMPER RETAINING NUT,A MONEL BUMPER RETAINING SCREW,A CLAPPER PIN,2 CLAPPER PIN BUSHINGS,2 SOUND DAMPENING BUSHING,A CLAPPER SEAL AND 2 BRASS RETAINING RINGS; End Item Identification: GEN.DYNAMICS SWING CHECK VALVE 700. 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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