Swordfish 32470 - 440pc Finishing Cup Washer Assortment With Organizer 
 
440 pieces assortment
Includes 6 different sizes #4, #6, #8, #10, #12, 1/4"
Include 220 pieces nickel plated steel cup washer and 220 piece solid brass cup washer
Use with standard 82° flat and oval head countersunk screws