Match the words (1-7) with the definitions (A-G). anchor ; 2. nut ; 3. nail ; 4. grade; 5. clamp; 6. metric thread; 7. sheet metal screw A. a piece of metal with a hole in the middle B. a long, narrow fastener with a smooth rod C. a device that tightly presses things together D. a thread measured in millimeters E. the measurement of a bolt’s strength F. a device that adds support to a screw G. a fastener with threads along the entire rod