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Universal Aluminium Mounting Hub for 5mm Shaft, 4-40 Holes (2-pack)

(1 customer review)

£5.94 inc VAT

Availability: 2 in stock

Brand: Pololu
Part Number: 1203
Barcode: 5055421023027

Universal Aluminium Mounting Hub for 5mm Shaft – Pololu 1203

These universal mounting hubs are designed to allow custom wheels and mechanisms to be fitted to 5mm motor shafts. They will work with most motor shaft types including round and “D” type shafts. Each hub has 4 threaded mounting holes designed to be used with #4-40 screws. Screwing the included #4-40 set screws into the set screw holes allows the hub to be secured to a 5mm motor shaft.


  • Size: 19mm diameter x 5mm thick
  • Weight: 3.2 g*
  • Shaft Diameter: 5 mm
  • Mounting Hole Size: #4-40

* This value is for a single mounting hub without set screw.

Included Items:

  • Two mounting hubs
  • Three #4-40 set screws (one for each hub and a spare)
  • One 0.05″ Allen wrench

Note: Screws for mounting wheel or mechanism to hub not included.

Pololu 1203 Aluminium Mounting Hub with included hardware


1 review for Universal Aluminium Mounting Hub for 5mm Shaft, 4-40 Holes (2-pack)

  1. Roger

    Essential to make connection to motor. Worth the small cost

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