Current Articles | Archives Washer Size ChartStaff posted on October 20, 2006 | SAE and USS Flat washer sizes SIZE INSIDE DIAMETER OUTSIDE DIAMETER THICKNESS SAE FLAT WASHERS #6 5/32" 3/8" 3/64" #8 3/16" 7/16" 3/64" #10 7/32" 1/2" 3/64" 1/4 9/32" 5/8" 1/16" 5/16 11/32" 11/16" 1/16" 3/8 13/32" 13/16" 1/16" 7/16 15/32" 59/64" 1/16" 1/2 17/32" 1-1/16" 3/32" 9/16 19/32" 1-3/16" 3/32" 5/8 21/32" 1-5/16" 3/32" 3/4 13/16" 1-1/2" 9/64" 7/8 15/16" 1-3/4" 9/64" 1" 1-1/16" 2" 9/64" 1-1/8 1-3/16" 2-1/4" 9/64" 1-1/4 1-5/16" 2-1/2" 5/32" 1-1/2 1-7/16" 3" 3/16" USS FLAT WASHERS 3/16 1/4" 9/16" 3/64" 1/4 5/16" 3/4" 1/16" 5/16 3/8" 7/8" 5/64" 3/8 7/16" 1" 5/64" 7/16 1/2" 1-1/4" 5/64" 1/2 9/16" 1-3/8" 7/64" 9/16 5/8" 1-1/2" 7/64" 5/8 11/16" 1-3/4" 9/64" 3/4 13/16" 2" 5/32" 7/8 15/16" 2-1/4" 11/64" 1" 1-1/16" 2-1/2" 11/64" 1-1/8 1-1/4" 2-3/4" 11/64" 1-1/4 1-3/8" 3" 11/64" 1-3/8 1-1/2" 3-1/4" 3/16" 1-1/2 1-5/8" 3-1/2" 3/16" 1-5/8 1-3/4" 3-3/4" 3/16" 1-3/4 1-7/8" 4" 3/16" 1-7/8 2" 4-1/4" 3/16" 2" 2-1/8" 4-1/2" 3/16" 2-1/2 2-5/8" 5" 15/64" 3" 3-1/8" 5-1/2" 9/32" Please enable JavaScript to view the comments powered by Disqus.