Extraneous Matter

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Across
  1. 3. Conductive element often used in machinery (5)
  2. 7. Mechanical fastener with a head (4)
  3. 8. Type of EM Originating from outside the system (9)
  4. 9. Tiny bits that may contaminate (9)
  5. 11. Imperfection or flaw in production (6)
  6. 12. Measure of excellence for medicines (7)
  7. 13. Fine threadlike strands growing from the skin of humans (5)
Down
  1. 1. Unwanted intruder in a product (7,9)
  2. 2. Brittle material used in containers (5)
  3. 4. Synthetic material often found in packaging (7)
  4. 5. Elastic material used in seals (6)
  5. 6. Method to spot imperfections on tablets (6,10)
  6. 10. Type of EM Inherent or natural to the substance (9)