PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

556-8838741-7Shaft,shouldered

Naval Sea Systems Command · NSN 3040-01-720-1091 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-720-1091 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-720-1091. Primary manufacturer part number: 556-8838741-7.
Features
  • Shaft,shouldered — FSC 3040
  • 6 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Shaft,shouldered, cataloged under National Stock Number 3040-01-720-1091, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Naval Sea Systems Command. This item has 6 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.

Catalog Facts
Item NameShaft,shouldered
FSC / FSG3040 — No Item Name Available (FSG 30)
ManufacturersNaval Sea Systems Command (CAGE 53711); Electric Boat Corporation Div General Dynamics Electric Boat (CAGE 96169)
Technical Specifications
ParameterValue
NSN3040-01-720-1091
Primary Part Number556-8838741-7
Item NameShaft,shouldered
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
9390-01-720-1033556-8838741-31 INTERCHANGEABLE
Nonmetallic Rod
Naval Sea Systems Command
5330-01-720-104954-94-8308 INTERCHANGEABLE
Retainer,packing
Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-720-7709556-8838741-12 INTERCHANGEABLE
Screw,cap,hexagon Head
Naval Sea Systems Command
3040-01-720-7749218033641 INTERCHANGEABLE
Clamp-Bushing Assembly,shaft-Hub
Electric Boat Corporation Div General Dynamics Electric Boat
2090-01-735-9253 INTERCHANGEABLE
Accumulator,hydraulic
Cross-Reference Index
Part NumberManufacturer
556-8838741-7 PRIMARY Naval Sea Systems Command (USA)
89-95-3000B PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
8838741 Naval Sea Systems Command (USA)
R6426930-7 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
LSA001609-7 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
8838741/PAGE 20 PN 7 Naval Sea Systems Command (USA)
Related Parts
9390-01-720-1033INTERCHANGEABLE
NONMETALLIC ROD
556-8838741-31
5330-01-720-1049INTERCHANGEABLE
RETAINER,PACKING
54-94-8308
5305-01-720-7709INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
556-8838741-12
3040-01-720-7749INTERCHANGEABLE
CLAMP-BUSHING ASSEMBLY,SHAFT-HUB
218033641
2090-01-735-9253INTERCHANGEABLE
ACCUMULATOR,HYDRAULIC

Frequently Asked Questions

What is NSN 3040-01-720-1091?

NSN 3040-01-720-1091 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-720-1091?

NSN 3040-01-720-1091 has 6 cross-referenced part numbers: 556-8838741-7 (Naval Sea Systems Command), 89-95-3000B (Electric Boat Corporation Div General Dynamics Electric Boat), 8838741 (Naval Sea Systems Command), R6426930-7 (Electric Boat Corporation Div General Dynamics Electric Boat), LSA001609-7 (Electric Boat Corporation Div General Dynamics Electric Boat) and 1 more.

What NSN replaces 3040-01-720-1091?

There are 5 known substitutes for 3040-01-720-1091: 9390-01-720-1033, 5330-01-720-1049, 5305-01-720-7709 and 2 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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