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