520 piece internal/external tooth lock washer assortment – #6 to 3/8″ – zinc contents: #6 external lock washer – zinc plated (50) #8 external lock washer – zinc plated (50) #10 external lock washer – zinc plated (50) 1/4 external lock washer – zinc plated (50) 5/16 external lock washer – zinc plated (35) 3/8 external lock washer – zinc plated (25) #6 internal lock washer – zinc plated (50) #8 internal lock washer – zinc plated (50) #10 internal lock washer – zinc plated (50) 1/4 internal lock washer – zinc plated (50) 5/16 internal lock washer – zinc plated (35) 3/8 internal lock washer – zinc plated (25)