These fittings can be used to block off any unwanted M10 x 1.0 brake line port. They are normally used on off-road vehicles on the master cylinder. The male thread is M10 x 1.0 bubble flare.
WARNING: This product can expose you to chemicals including Lead which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. Wash hands following installation or before eating. All parts legal for use on pre-pollution controlled vehicles only.