PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

DM47520 ITEM 34Gear Operator,valve

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-01-260-1976 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-260-1976 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-260-1976. Primary manufacturer part number: DM47520 ITEM 34.
Features
  • Gear Operator,valve — FSC 4820
  • Valve Size for Which Designed: 13.000 INCHES IN
  • Valve Type for Which Designed: VENT
  • 5 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
  • Power transmission and speed reduction
  • Rotary motion transfer
General Description

The Gear Operator,valve, cataloged under National Stock Number 4820-01-260-1976, 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 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-260-1976
Primary Part NumberDM47520 ITEM 34
Item NameGear Operator,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Valve Size for Which Designed13.000 INCHES IN
Valve Type for Which DesignedVENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2520-01-259-7476DM47520 ITEM 38 INTERCHANGEABLE
Universal Joint,vehicular
Electric Boat Corporation Div General Dynamics Electric Boat
2520-01-259-7477DM47520 ITEM 39 INTERCHANGEABLE
Universal Joint,vehicular
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-261-023225-D-058 INTERCHANGEABLE
Gear Operator,valve
Derbyshire Machine & Tool Co
4820-01-267-939987643-7505 ITEM 52 INTERCHANGEABLE
Plate,stop,valve
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-317-07874675699-0033 INTERCHANGEABLE
Gear Operator,valve
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
4675699 ITEM 34 Naval Ship Systems Command (USA)
87643-7505 ITEM 34 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
4675699 Naval Ship Systems Command (USA)
87643-7505 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
DM47520 ITEM 34 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
Related Parts
2520-01-259-7476INTERCHANGEABLE
UNIVERSAL JOINT,VEHICULAR
DM47520 ITEM 38
2520-01-259-7477INTERCHANGEABLE
UNIVERSAL JOINT,VEHICULAR
DM47520 ITEM 39
4820-01-261-0232INTERCHANGEABLE
GEAR OPERATOR,VALVE
25-D-058
4820-01-267-9399INTERCHANGEABLE
PLATE,STOP,VALVE
87643-7505 ITEM 52
4820-01-317-0787INTERCHANGEABLE
GEAR OPERATOR,VALVE
4675699-0033

Frequently Asked Questions

What is NSN 4820-01-260-1976?

NSN 4820-01-260-1976 is a Gear Operator,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 4820-01-260-1976?

NSN 4820-01-260-1976 has 5 cross-referenced part numbers: 4675699 ITEM 34 (Naval Ship Systems Command), 87643-7505 ITEM 34 (Electric Boat Corporation Div General Dynamics Electric Boat), 4675699 (Naval Ship Systems Command), 87643-7505 (Electric Boat Corporation Div General Dynamics Electric Boat), DM47520 ITEM 34 (Electric Boat Corporation Div General Dynamics Electric Boat).

What NSN replaces 4820-01-260-1976?

There are 5 known substitutes for 4820-01-260-1976: 2520-01-259-7476, 2520-01-259-7477, 4820-01-261-0232 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of DM47520 ITEM 34?

Key specifications for DM47520 ITEM 34: Valve Size for Which Designed: 13.000 INCHES IN; Valve Type for Which Designed: VENT. 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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