Pololu Universal Aluminum Mounting Hub for 3mm Shaft, M3 Holes (2-Pack)

Pololu item #: 1996 403 in stock
Brand: Pololu
Status: Active and Preferred 

Price break Unit price (US$)
1 5.95
10 5.25
100 4.46

backorders allowed

These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 mm diameter motor shafts. The set includes two hubs, two M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has four threaded mounting holes for M3 screws (not included).

We have an assortment of universal mounting hubs available, spanning several shaft sizes and featuring mounting holes threaded for metric or imperial screws:

Alternatives available with variations in these parameter(s): shaft diameter, mounting hole size.

 Description Specs (4) Pictures (2) Resources (2) FAQs (0) On the blog (1) 


Size: 17.5 mm diameter × 5 mm thick
Weight: 2.8 g1
Shaft diameter: 3 mm
Mounting hole size: M32


For a single hub only (without set screw).
This is also the size of the set screw.

Related Products

Machine Screw: M3, 8mm Length, Phillips (25-pack)
Machine Hex Nut: M3 (25-pack)
Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #4-40 Holes (2-Pack)
Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)
3mm Hexagonal Shaft Adapter for LEGO Wheels (Pair)
Hex (Allen) Wrench 0.05"

Related Categories

Pololu Universal Mounting Hubs
3mm Shaft Gearmotors
Pololu Wheels and Tracks
Nuts and Screws
Log In
Pololu Robotics & Electronics
Shopping cart
(702) 262-6648
Same-day shipping, worldwide
Shop Blog Forum Support
My account Comments or questions? About Pololu Contact Ordering information Distributors