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