PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

87643-9804 ITEM 14Lock Plate,gear

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 3020-01-154-9751 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-154-9751 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-154-9751. Primary manufacturer part number: 87643-9804 ITEM 14.
Features
  • Lock Plate,gear — FSC 3020
  • General Characteristics Item Description: NICKEL ALLOY QQ-N-281 CL A;IRREGULAR SHAPE;12.760 IN. O/A DIA;0.88O IN. THK;7.900 IN. ID;TWO HOLES 1.000 IN. ID,10.000 IN. C TO C,180 DEG APART;ONE SLOT 1.470 IN. WIDE IN BORE IN
  • 3 verified cross-references
  • Primary manufacturer: Electric Boat Corporation Div General Dynamics Electric Boat
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
General Description

The Lock Plate,gear, cataloged under National Stock Number 3020-01-154-9751, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment 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 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-154-9751
Primary Part Number87643-9804 ITEM 14
Item NameLock Plate,gear
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
General Characteristics Item DescriptionNICKEL ALLOY QQ-N-281 CL A;IRREGULAR SHAPE;12.760 IN. O/A DIA;0.88O IN. THK;7.900 IN. ID;TWO HOLES 1.000 IN. ID,10.000 IN. C TO C,180 DEG APART;ONE SLOT 1.470 IN. WIDE IN BORE IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-01-103-3326501-4675792 ITEM 34 INTERCHANGEABLE
Band,valve
Naval Ship Systems Command
4820-01-137-4631501-4675792 ITEM 8 INTERCHANGEABLE
Stop Plate,valve
Naval Ship Systems Command
4820-01-137-4632501-4675792 ITEM 16 INTERCHANGEABLE
Support,valve
Naval Ship Systems Command
4820-01-137-5926501-4675792 ITEM 23 INTERCHANGEABLE
Rack Support,valve
Naval Ship Systems Command
3040-01-154-81134675792-0012 INTERCHANGEABLE
Connecting Link,rigid
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-154-8125501-4675792 ITEM 1 INTERCHANGEABLE
Stem,fluid Valve
Naval Ship Systems Command
4820-01-154-812687643-9804 ITEM 2 INTERCHANGEABLE
Stem,fluid Valve
Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-173-4600501-4675792 ITEM 17 INTERCHANGEABLE
Cover,access
Naval Ship Systems Command
4820-01-175-7727501-4675792 ITEM 15 INTERCHANGEABLE
Stop,valve
Naval Ship Systems Command
4820-01-191-6572501-4675792 ITEM 5 INTERCHANGEABLE
Rack,valve
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
501-4675792 Naval Ship Systems Command (USA)
87643-9804 ITEM 14 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
501-4675792 ITEM 14 Naval Ship Systems Command (USA)
Related Parts
4820-01-103-3326INTERCHANGEABLE
BAND,VALVE
501-4675792 ITEM 34
4820-01-137-4631INTERCHANGEABLE
STOP PLATE,VALVE
501-4675792 ITEM 8
4820-01-137-4632INTERCHANGEABLE
SUPPORT,VALVE
501-4675792 ITEM 16
4820-01-137-5926INTERCHANGEABLE
RACK SUPPORT,VALVE
501-4675792 ITEM 23
3040-01-154-8113INTERCHANGEABLE
CONNECTING LINK,RIGID
4675792-0012
4820-01-154-8125INTERCHANGEABLE
STEM,FLUID VALVE
501-4675792 ITEM 1
4820-01-154-8126INTERCHANGEABLE
STEM,FLUID VALVE
87643-9804 ITEM 2
5340-01-173-4600INTERCHANGEABLE
COVER,ACCESS
501-4675792 ITEM 17
4820-01-175-7727INTERCHANGEABLE
STOP,VALVE
501-4675792 ITEM 15
4820-01-191-6572INTERCHANGEABLE
RACK,VALVE
501-4675792 ITEM 5
3020-01-191-6675INTERCHANGEABLE
GEAR,SPUR
4675792-0006
3020-01-192-4639INTERCHANGEABLE
GEAR,SPUR
501-4675792 ITEM 7

Frequently Asked Questions

What is NSN 3020-01-154-9751?

NSN 3020-01-154-9751 is a Lock Plate,gear, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-154-9751?

NSN 3020-01-154-9751 has 3 cross-referenced part numbers: 501-4675792 (Naval Ship Systems Command), 87643-9804 ITEM 14 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675792 ITEM 14 (Naval Ship Systems Command).

What NSN replaces 3020-01-154-9751?

There are 12 known substitutes for 3020-01-154-9751: 4820-01-103-3326, 4820-01-137-4631, 4820-01-137-4632 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 87643-9804 ITEM 14?

Key specifications for 87643-9804 ITEM 14: General Characteristics Item Description: NICKEL ALLOY QQ-N-281 CL A;IRREGULAR SHAPE;12.760 IN. O/A DIA;0.88O IN. THK;7.900 IN. ID;TWO HOLES 1.000 IN. ID,10.000 IN. C TO C,180 DEG APART;ONE SLOT 1.470 IN. WIDE IN BORE IN. 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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