Next test-fit the components together to make sure that they mate properly.

Angle-polished connectors only mate properly to other angle-polished connectors.

It seems the locks won't mate properly.

Hermana's beasts were always herded together properly, branded properly, milked properly, mated properly, medicined properly.

A set of gears, any of which will mate properly with any other.

Valves and seats will usually have the same angle to mate properly.

Chief Weintraub's exclamation of triumph came over the com as the pod finally mated properly.

The thread profile of such screws is approximately semicircular (commonly a "gothic arch" profile) to properly mate with the bearing balls.

Different fasteners have different threads; it is essential to choose the correct tap or die so the cut threads will mate properly with the fastener.

However, the new T-34/85's turret had been designed to accommodate the already-available D-5 gun, and did not mate properly with Grabin's gun.