PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6B0668Shaft,straight

Caterpillar Inc Div Caterpillar Defense · NSN 3040-00-368-1918 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-368-1918 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-368-1918. Primary manufacturer part number: 6B0668.
Features
  • Shaft,straight — FSC 3040
  • End Similarity: IDENTICAL
  • First End Diameter: 1.0000 INCHES NOMINAL IN
  • First End Keyway Width: 0.2500 INCHES NOMINAL IN
  • Material: STEEL COMP 1112
  • External Keyway Length: 1.000 INCHES NOMINAL FIRST END IN
  • First End Distance From Keyway Center to End: 8.000 INCHES NOMINAL IN
  • First End Style: WOODRUFF KEYWAY
Applications
  • Applications requiring Steel Comp 1112 construction
General Description

The Shaft,straight, cataloged under National Stock Number 3040-00-368-1918, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 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
NSN3040-00-368-1918
Primary Part Number6B0668
Item NameShaft,straight
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
End SimilarityIDENTICAL
First End Diameter1.0000 INCHES NOMINAL IN
First End Keyway Width0.2500 INCHES NOMINAL IN
MaterialSTEEL COMP 1112
External Keyway Length1.000 INCHES NOMINAL FIRST END IN
First End Distance From Keyway Center to End8.000 INCHES NOMINAL IN
First End StyleWOODRUFF KEYWAY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5360-00-070-0019P11459 INTERCHANGEABLE
Spring,helical,compression
Aerosonic Llc
6130-00-106-6445PP6241U INTERCHANGEABLE
Charger,battery
Joint Electronics Type Designation System
3120-00-287-8691N11189 INTERCHANGEABLE
Bearing,sleeve
Leslie Controls, Inc. Dba Leslie Controls Inc
2815-00-416-8682P11459 INTERCHANGEABLE
Insert,engine Valve Seat
Sterling Engine Co Inc
5910-00-879-6983 INTERCHANGEABLE
Capacitor,fixed,electrolytic
5965-00-927-3123273-0025-010 INTERCHANGEABLE
Headset,electrical
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6145-01-120-422711189 INTERCHANGEABLE
Wire,electrical
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
4320-01-130-2220 INTERCHANGEABLE
Ring,wearing
4710-01-287-24981-1189 ITEM 15 INTERCHANGEABLE
Tube,cooler
Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)
4420-01-287-2568 INTERCHANGEABLE
Cooler,fluid,industrial
Cross-Reference Index
Part NumberManufacturer
6B668 Caterpillar Inc Div Caterpillar Defense (USA)
11189 Garwood/feller Inc Garwood Winch Div (USA)
P11459 Osgood Co the (USA)
6B0668 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
955020 Scott Huber Essick a Co of Figgie International Inc (USA)
1144F PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
3F1144F Fwd Seagrave Holdings Lp (USA)
Related Parts
5360-00-070-0019INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
P11459
6130-00-106-6445INTERCHANGEABLE
CHARGER,BATTERY
PP6241U
3120-00-287-8691INTERCHANGEABLE
BEARING,SLEEVE
N11189
2815-00-416-8682INTERCHANGEABLE
INSERT,ENGINE VALVE SEAT
P11459
5910-00-879-6983INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
5965-00-927-3123INTERCHANGEABLE
HEADSET,ELECTRICAL
273-0025-010
6145-01-120-4227INTERCHANGEABLE
WIRE,ELECTRICAL
11189
4320-01-130-2220INTERCHANGEABLE
RING,WEARING
4710-01-287-2498INTERCHANGEABLE
TUBE,COOLER
1-1189 ITEM 15
4420-01-287-2568INTERCHANGEABLE
COOLER,FLUID,INDUSTRIAL
5995-01-287-2760INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
4240-01-564-1175INTERCHANGEABLE
HEADBAND,GOGGLES
11-189

Frequently Asked Questions

What is NSN 3040-00-368-1918?

NSN 3040-00-368-1918 is a Shaft,straight, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-00-368-1918?

NSN 3040-00-368-1918 has 7 cross-referenced part numbers: 6B668 (Caterpillar Inc Div Caterpillar Defense), 11189 (Garwood/feller Inc Garwood Winch Div), P11459 (Osgood Co the), 6B0668 (Caterpillar Inc Div Caterpillar Defense), 955020 (Scott Huber Essick a Co of Figgie International Inc) and 2 more.

What NSN replaces 3040-00-368-1918?

There are 12 known substitutes for 3040-00-368-1918: 5360-00-070-0019, 6130-00-106-6445, 3120-00-287-8691 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6B0668?

Key specifications for 6B0668: End Similarity: IDENTICAL; First End Diameter: 1.0000 INCHES NOMINAL IN; First End Keyway Width: 0.2500 INCHES NOMINAL IN; Material: STEEL COMP 1112. 9 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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