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