Relier Pairs fasteners-Exercise EVersion en ligne Matching the beginnings and the ends of the sentences. par Ella Glazov 1 Bolts and nuts are shaped 2 The heads of screws are slotted 3 We can describe a screw… 4 Cotter pins are also referred to 5 Safety wire is easily… 6 A cotter pin is also used… 7 The tip of a rivet is pounded or mushroomed… 8 9 Safety wire is made of to engage screwdrivers. copper or steel. by its slot. to form another head. are split. as safetying devices. twisted or bent. to safety bolts and pins.