PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55551Shaft,shouldered

Altra Industrial Motion Corp. · NSN 3040-00-138-2242 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-138-2242 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-138-2242. Primary manufacturer part number: 55551.
Features
  • Shaft,shouldered — FSC 3040
  • Second End Diameter: 0.9840 INCHES NOMINAL IN
  • Second End Style: PLAIN
  • Step Quantity: 3
  • First End Style: PLAIN
  • End Similarity: NOT IDENTICAL
  • Largest Step Diameter: 1.375 INCHES NOMINAL IN
  • First End Diameter: 1.3750 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Shaft,shouldered, cataloged under National Stock Number 3040-00-138-2242, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 7 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-00-138-2242
Primary Part Number55551
Item NameShaft,shouldered
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerAltra Industrial Motion Corp.
StatusACTIVE
Second End Diameter0.9840 INCHES NOMINAL IN
Second End StylePLAIN
Step Quantity3
First End StylePLAIN
End SimilarityNOT IDENTICAL
Largest Step Diameter1.375 INCHES NOMINAL IN
First End Diameter1.3750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5961-00-057-03545555-1 INTERCHANGEABLE
Semiconductor Device,diode
Ballantine Laboratories Inc
5998-00-122-657955551 INTERCHANGEABLE
Circuit Card Assembly
Cae Inc
5910-00-160-2269IAT1125SS INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Prestolite Electric Inc
5360-00-663-3349 INTERCHANGEABLE
Spring,helical,torsion
1650-00-832-248755551 INTERCHANGEABLE
Rocker,pump Assy,en
Parker Hannifin Corporation Div Hydraulic Systems Division
5905-00-908-9579176-10K0HMSP0RM5PCT INTERCHANGEABLE
Resistor,variable,wire Wound,non
Techno Components Corp Dba Techno Components
2540-00-910-89335-5551 INTERCHANGEABLE
Handle,door,vehicular
Eastern Co Div Eberhard Manufacturing
6760-01-533-643855551 INTERCHANGEABLE
Mount,aircraft Camera
Aerovironment, Inc. Dba Aerovironment Inc
Cross-Reference Index
Part NumberManufacturer
55551 PRIMARY Altra Industrial Motion Corp. (USA)
Related Parts
5961-00-057-0354INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5555-1
5998-00-122-6579INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
55551
5910-00-160-2269INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
IAT1125SS
5360-00-663-3349INTERCHANGEABLE
SPRING,HELICAL,TORSION
1650-00-832-2487INTERCHANGEABLE
ROCKER,PUMP ASSY,EN
55551
5905-00-908-9579INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
176-10K0HMSP0RM5PCT
2540-00-910-8933INTERCHANGEABLE
HANDLE,DOOR,VEHICULAR
5-5551
6760-01-533-6438INTERCHANGEABLE
MOUNT,AIRCRAFT CAMERA
55551

Frequently Asked Questions

What is NSN 3040-00-138-2242?

NSN 3040-00-138-2242 is a Shaft,shouldered, manufactured by Altra Industrial Motion Corp., classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-00-138-2242?

NSN 3040-00-138-2242 has 1 cross-referenced part number: 55551 (Altra Industrial Motion Corp.).

What NSN replaces 3040-00-138-2242?

There are 8 known substitutes for 3040-00-138-2242: 5961-00-057-0354, 5998-00-122-6579, 5910-00-160-2269 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 55551?

Key specifications for 55551: Second End Diameter: 0.9840 INCHES NOMINAL IN; Second End Style: PLAIN; Step Quantity: 3; First End Style: PLAIN. 8 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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