Circlips can be used for bores with grooves. These are called Internal Circlips as they fit internally in the bore.
Internal Circlips are always listed by the bore size they fit into. For example if you require a Circlip to fit a 30mm bore, you would need a 30mm Internal Circlip.
You can browse our full range of Internal Circlips online by using this link: https://springfasteners.co.uk/product-category/circlips/