Standard Washers SAE Flat Washer Actual Size Chart lbs per M pcs per 50 lbs pcs per lbs #10 0.688 (0.678/0.698) 0.219 (0.209/0.229) 5.25 9530 190.6 #10 0.750 (0.740/0.760) 0.219 (0.209/0.229) 6.25 8000 160.0 #10 0.875 (0.865/0.885) 0.219 (0.209/0.229) 10.00 5000 100.0 #10 1.000 (0.990/1.010) 0.219 (0.209/0.229) 14.29 3500 70.0 #10 1.250 (1.240/1.260) 0.219 (0.209/0.229) 23.32 2145 42.9 #10 1.500 (1.490/1.510) 0.219 (0.209/0.229) 28.41 1760 35.2 #10 2.000 (1.990/2.010) 0.219 (0.209/0.229) 62.82 796 15.9 1/4 1.000 (0.990/1.010) 0.281 (0.271/0.291) 13.34 3750 75.0 1/4 1.250 (1.240/1.260) 0.281 (0.271/0.291) 21.74 2300 46.0 1/4 1.500 (1.490/1.510) 0.281 (0.271/0.291) 32.26 1550 31.0 1/4 1.750 (1.740/1.760) 0.281 (0.271/0.291) 45.46 1100 22.0 1/4 2.000 (1.990/2.010) 0.281 (0.271/0.291) 61.73 810 16.2 5/16 1.000 (0.990/1.010) 0.344 (0.334/0.354) 10.71 4670 93.4 5/16 1.250 (1.240/1.260) 0.344 (0.334/0.354) 20.84 2400 48.0 5/16 1.500 (1.490/1.510) 0.344 (0.334/0.354) 31.25 1600 32.0 5/16 2.000 (1.990/2.010) 0.344 (0.334/0.354) 60.98 820 16.4 5/16 2.500 (2.490/2.510) 0.344 (0.334/0.354) 100.00 500 10.0 3/8 1.250 (1.240/1.260) 0.406 (0.396/0.416) 21.28 2350 47.0 3/8 1.500 (1.490/1.510) 0.406 (0.396/0.416) 30.31 1650 33.0 3/8 1.750 (1.740/1.760) 0.406 (0.396/0.416) 44.25 1130 22.6 3/8 2.000 (1.990/2.010) 0.422 (0.412/0.432) 50.00 1000 20.0 3/8 2.500 (2.490/2.510) 0.422 (0.412/0.432) 97.66 512 10.2 1/2 1.250 (1.240/1.260) 0.531 (0.521/0.541) 16.67 3000 60.0 1/2 1.500 (1.490/1.510) 0.531 (0.521/0.541) 25.00 2000 40.0 1/2 1.750 (1.740/1.760) 0.531 (0.521/0.541) 43.67 1145 22.9 1/2 2.000 (1.990/2.010) 0.531 (0.521/0.541) 52.64 950 19.0 1/2 2.500 (2.490/2.510) 0.531 (0.521/0.541) 74.86 668 13.4 1/2 3.000 (2.990/3.010) 0.531 (0.521/0.541) 140.85 355 7.1 5/8 1.250 (1.240/1.260) 0.688 (0.678/0.698) 13.93 3590 71.8 5/8 2.000 (1.990/2.010) 0.688 (0.678/0.698) 49.27 1015 20.3 5/8 3.000 (2.990/3.010) 0.688 (0.678/0.698) 136.99 365 7.3 3/4 2.000 (1.985/2.015) 0.812 (0.802/0.822) 43.30 1155 23.1 7/8 2.500 (2.485/2.515) 0.938 (0.928/0.948) 69.94 715 14.3 .051/.080 .051/.080 .101/.118 .051/.080 .051/.132 .051/.080 .051/.080 .074/.084 .051/.080 .036/.132 .051/.132 .051/.080 .051/.080 .051/.080 .051/.080 .036/.080 .036/.132 .036/.132 .036/.080 .036/.080 .036/.132 .051/.080 .036/.132 .036/.132 .036/.132 .036/.080 .036/.080 .036/.080 .036/.080 .036/.080 .036/.084 .036/.084 .051/.080 *all weight and pcs count are approx. Bolt Size Outside Dia.(inch) Inside Dia.(inch) Thickness (Min/Max) Fender Washer TM QUICK REFERENCE GUIDE #10 #12 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 Fender Washer Actual Size Chart .938” (7/8) .812” (3/4) .688” (5/8) .344” (5/16) .281” (1/4) .219” (#10) .406” (3/8) .422” (3/8) .531” (1/2) 3.00” 2.50” 2.00” 1.75” 1.50” 1.25” 1.00” 0.688” 0.750” 0.875” OD ID SAE Fastener Catalog 2018.1 9 323.262.0259 zalindustrial.com