PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40668Shaft,straight

New Haven Mfg Corp · NSN 3040-00-106-1878 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-106-1878 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-106-1878. Primary manufacturer part number: 40668.
Features
  • Shaft,straight — FSC 3040
  • Second End Groove Diameter: 0.0950 INCHES NOMINAL IN
  • End Similarity: NOT IDENTICAL
  • Material: STEEL COMP 303
  • Second End Diameter: 0.1245 INCHES NOMINAL IN
  • Second End Distance From End to Groove: 0.050 INCHES NOMINAL IN
  • First End Style: PLAIN
  • Second End Distance Between First and Second Groove Centers: 0.283 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Comp 303 construction
General Description

The Shaft,straight, cataloged under National Stock Number 3040-00-106-1878, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is New Haven Mfg Corp. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-00-106-1878
Primary Part Number40668
Item NameShaft,straight
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerNew Haven Mfg Corp
StatusACTIVE
Second End Groove Diameter0.0950 INCHES NOMINAL IN
End SimilarityNOT IDENTICAL
MaterialSTEEL COMP 303
Second End Diameter0.1245 INCHES NOMINAL IN
Second End Distance From End to Groove0.050 INCHES NOMINAL IN
First End StylePLAIN
Second End Distance Between First and Second Groove Centers0.283 INCHES NOMINAL IN
Second End StyleTWO CIRCULAR GROOVES
First End Diameter0.1245 INCHES NOMINAL IN
Second End Groove Width0.0180 INCHES NOMINAL IN
Surface Finish16.0 MICROINCHES
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5120-00-142-5156 INTERCHANGEABLE
Socket,socket Wrench
5961-00-331-3065 INTERCHANGEABLE
Semiconductor Device,thyristor
3040-01-614-771440668-1 INTERCHANGEABLE
Cylinder Assembly,actuating,line
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
Cross-Reference Index
Part NumberManufacturer
40668 New Haven Mfg Corp (USA)
Related Parts
5120-00-142-5156INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5961-00-331-3065INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
3040-01-614-7714INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
40668-1

Frequently Asked Questions

What is NSN 3040-00-106-1878?

NSN 3040-00-106-1878 is a Shaft,straight, manufactured by New Haven Mfg Corp, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-00-106-1878?

NSN 3040-00-106-1878 has 1 cross-referenced part number: 40668 (New Haven Mfg Corp).

What NSN replaces 3040-00-106-1878?

There are 3 known substitutes for 3040-00-106-1878: 5120-00-142-5156, 5961-00-331-3065, 3040-01-614-7714. Verify interchangeability with system specifications before substitution.

What are the specifications of 40668?

Key specifications for 40668: Second End Groove Diameter: 0.0950 INCHES NOMINAL IN; End Similarity: NOT IDENTICAL; Material: STEEL COMP 303; Second End Diameter: 0.1245 INCHES NOMINAL IN. 13 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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