PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

L5178Shaft,straight

Crown Industrial Products Co · NSN 3040-01-039-2783 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-039-2783 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-039-2783. Primary manufacturer part number: L5178.
Features
  • Shaft,straight — FSC 3040
  • Second End Diameter: 0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
  • Second End Keyway Width: 0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
  • First End Keyway Width: 0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
  • External Keyway Length: 0.750 INCHES NOMINAL SECOND END IN
  • Second End Distance From Keyway Center to End: 3.000 INCHES NOMINAL IN
  • External Keyway Length: 1.500 INCHES NOMINAL FIRST END IN
  • First End Diameter: 0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
Applications
  • Applications requiring Steel construction
General Description

The Shaft,straight, cataloged under National Stock Number 3040-01-039-2783, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Crown Industrial Products Co. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN3040-01-039-2783
Primary Part NumberL5178
Item NameShaft,straight
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerCrown Industrial Products Co
StatusACTIVE
Second End Diameter0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
Second End Keyway Width0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
First End Keyway Width0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
External Keyway Length0.750 INCHES NOMINAL SECOND END IN
Second End Distance From Keyway Center to End3.000 INCHES NOMINAL IN
External Keyway Length1.500 INCHES NOMINAL FIRST END IN
First End Diameter0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
First End Keyway Depth0.102 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN
MaterialSTEEL
Second End StyleWOODRUFF KEYWAY
End SimilarityNOT IDENTICAL
First End StyleFLAT KEYWAY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-36512K5065 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Caterpillar Inc Div Caterpillar Defense
6210-00-161-806930152 INTERCHANGEABLE
Light,indicator
Gte Products Corp Sylvania Miniature Lighting Div
5930-00-322-0115110BP02MM0D7100 INTERCHANGEABLE
Switch,pressure
Johnson Controls Inc Control Products Div
4820-00-803-334630152 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Triumph Thermal Systems - Maryland, Inc.
5905-00-897-707230152 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
5985-00-943-844630152 INTERCHANGEABLE
Waveguide Assembly
Waveline Inc
5365-01-108-98123015-2 INTERCHANGEABLE
Spacer,ring
Kearflex Engineering Company
4820-01-515-931427CC23M-Y701S4 INTERCHANGEABLE
Valve,safety Relief
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
4820-01-515-931730004 INTERCHANGEABLE
Guide,valve Stem
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
5360-01-516-4445C3239 INTERCHANGEABLE
Spring,helical,compression
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
Cross-Reference Index
Part NumberManufacturer
30152 Crown Industrial Products Co (USA)
L5178 PRIMARY Crown Industrial Products Co (USA)
Related Parts
3110-00-100-3651INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
2K5065
6210-00-161-8069INTERCHANGEABLE
LIGHT,INDICATOR
30152
5930-00-322-0115INTERCHANGEABLE
SWITCH,PRESSURE
110BP02MM0D7100
4820-00-803-3346INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
30152
5905-00-897-7072INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
30152
5985-00-943-8446INTERCHANGEABLE
WAVEGUIDE ASSEMBLY
30152
5365-01-108-9812INTERCHANGEABLE
SPACER,RING
3015-2
4820-01-515-9314INTERCHANGEABLE
VALVE,SAFETY RELIEF
27CC23M-Y701S4
4820-01-515-9317INTERCHANGEABLE
GUIDE,VALVE STEM
30004
5360-01-516-4445INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
C3239
7510-01-623-9209INTERCHANGEABLE
LABEL TAPE,PRESSURE SENSITIVE AD
THT-21-428
5325-01-628-1016INTERCHANGEABLE
LOCK SPRING,TURNLOCK FASTENER
30152

Frequently Asked Questions

What is NSN 3040-01-039-2783?

NSN 3040-01-039-2783 is a Shaft,straight, manufactured by Crown Industrial Products Co, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-039-2783?

NSN 3040-01-039-2783 has 2 cross-referenced part numbers: 30152 (Crown Industrial Products Co), L5178 (Crown Industrial Products Co).

What NSN replaces 3040-01-039-2783?

There are 12 known substitutes for 3040-01-039-2783: 3110-00-100-3651, 6210-00-161-8069, 5930-00-322-0115 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of L5178?

Key specifications for L5178: Second End Diameter: 0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Second End Keyway Width: 0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN; First End Keyway Width: 0.1870 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN; External Keyway Length: 0.750 INCHES NOMINAL SECOND END 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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