PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

87643-7504 ITEM 12Connecting Link,rigid

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 3040-01-121-1993 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-121-1993 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-121-1993. Primary manufacturer part number: 87643-7504 ITEM 12.
Features
  • Connecting Link,rigid — FSC 3040
  • Material: NICKEL ALLOY
  • Body Thickness: 0.560 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
  • Link Style: STRAIGHT
  • Body Width: 1.250 INCHES NOMINAL IN
  • Body Construction: SOLID
  • 4 verified cross-references
  • Primary manufacturer: Electric Boat Corporation Div General Dynamics Electric Boat
Applications
  • Applications requiring Nickel Alloy construction
General Description

The Connecting Link,rigid, cataloged under National Stock Number 3040-01-121-1993, is classified within Federal Supply Class 3040 (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 5 verified specifications, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-01-121-1993
Primary Part Number87643-7504 ITEM 12
Item NameConnecting Link,rigid
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
MaterialNICKEL ALLOY
Body Thickness0.560 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
Link StyleSTRAIGHT
Body Width1.250 INCHES NOMINAL IN
Body ConstructionSOLID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3020-01-096-2021501-4675698 ITEM 14 INTERCHANGEABLE
Plate,drive,gear,lock
Naval Ship Systems Command
4820-01-103-0157501-4675698 ITEM 8 INTERCHANGEABLE
Plate,stop,valve
Naval Ship Systems Command
4820-01-103-0158501-4675698 ITEM 13 INTERCHANGEABLE
Rod Retainer,valve
Naval Ship Systems Command
4820-01-103-3325501-4675698 ITEM 35 INTERCHANGEABLE
Shield,dust
Bright Lights Usa, Inc Dba Blusa Defense Manufacturing
4820-01-121-19094675698-0020 INTERCHANGEABLE
Shroud,valve
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-121-289887643-7504 ITEM 9 INTERCHANGEABLE
Drum,valve
Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-123-3107501-4675698 ITEM 15 INTERCHANGEABLE
Stop,gear
Naval Ship Systems Command
4820-01-130-5559501-4675698 ITEM 16 INTERCHANGEABLE
Rod,vent Valve
Naval Ship Systems Command
3020-01-149-7908501-4675698 ITEM 5-6-7 INTERCHANGEABLE
Gear Set
Naval Ship Systems Command
3020-01-257-1559501-4675698 ITEM 54 INTERCHANGEABLE
Gear,drive,vent Valve
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
87643-7504 ITEM 12 PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
501-4675698 Naval Sea Systems Command (USA)
87643-7504 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
501-4675698 ITEM 12 Naval Sea Systems Command (USA)
Related Parts
3020-01-096-2021INTERCHANGEABLE
PLATE,DRIVE,GEAR,LOCK
501-4675698 ITEM 14
4820-01-103-0157INTERCHANGEABLE
PLATE,STOP,VALVE
501-4675698 ITEM 8
4820-01-103-0158INTERCHANGEABLE
ROD RETAINER,VALVE
501-4675698 ITEM 13
4820-01-103-3325INTERCHANGEABLE
SHIELD,DUST
501-4675698 ITEM 35
4820-01-121-1909INTERCHANGEABLE
SHROUD,VALVE
4675698-0020
4820-01-121-2898INTERCHANGEABLE
DRUM,VALVE
87643-7504 ITEM 9
3020-01-123-3107INTERCHANGEABLE
STOP,GEAR
501-4675698 ITEM 15
4820-01-130-5559INTERCHANGEABLE
ROD,VENT VALVE
501-4675698 ITEM 16
3020-01-149-7908INTERCHANGEABLE
GEAR SET
501-4675698 ITEM 5-6-7
3020-01-257-1559INTERCHANGEABLE
GEAR,DRIVE,VENT VALVE
501-4675698 ITEM 54
5365-01-257-1560INTERCHANGEABLE
BUSHING,VENT VALVE
501-4675698 ITEM 52
3040-01-264-8419INTERCHANGEABLE
SHAFT,STRAIGHT
501-4675698 ITEM 55

Frequently Asked Questions

What is NSN 3040-01-121-1993?

NSN 3040-01-121-1993 is a Connecting Link,rigid, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-121-1993?

NSN 3040-01-121-1993 has 4 cross-referenced part numbers: 87643-7504 ITEM 12 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675698 (Naval Sea Systems Command), 87643-7504 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675698 ITEM 12 (Naval Sea Systems Command).

What NSN replaces 3040-01-121-1993?

There are 12 known substitutes for 3040-01-121-1993: 3020-01-096-2021, 4820-01-103-0157, 4820-01-103-0158 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 87643-7504 ITEM 12?

Key specifications for 87643-7504 ITEM 12: Material: NICKEL ALLOY; Body Thickness: 0.560 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN; Link Style: STRAIGHT; Body Width: 1.250 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com