Caleb Components offers Starlock Push On Fasteners.
Designed to push on to a shaft to ensure a permanent grip. Note! These are sold without caps.
Sizes range from 2mm up to 14mm.

Why not check out our range of Starlock Fasteners using the below link.
https://springfasteners.co.uk/product-category/push-on-fasteners-2/push-on-fasteners/