lbs per M pcs per 50 lbs pcs per lbs 3/16 1/4 (0.245/0.265) 9/16 (0.557/0.577) 3/64 (.036/.065) 2.8 18,050 361 1/4 5/16 (0.307/0.327) 3/4 (0.727/0.749) 1/16 (.051/.080) 6.7 7,450 149 5/16 3/8 (0.370/0.390) 7/8 (0.868/0.905) 5/64 (.064/.104) 11.5 4,350 87 3/8 7/16 (0.433/0.453) 1 (0.993/1.030) 5/64 (.064/.104) 14.9 3,350 67 7/16 1/2 (0.495/0.515) 1 1/4 (1.243/1.280) 5/64 (.064/.104) 24.4 2,050 41 1/2 9/16 (0.557/0.577) 1 3/8 (1.368/1.405) 7/64 (.086/.132) 38.5 1,300 26 9/16 5/8 (0.620/0.640) 1 1/2 (1.462/1.499) 7/64 (.086/.132) 45.5 1,100 22 5/8 11/16 (0.681/0.718) 1 3/4 (1.743/1.780) 9/64 (.108/.160) 77 650 13 3/4 13/16 (0.805/0.842) 2 (1.993/2.030) 5/32 (.122/.177) 110 455 9.1 7/8 15/16 (0.931/0.968) 2 1/4 (2.243/2.280) 11/64 (.136/.192) 153 325 6.5 1 1 1/16 (1.055/1.092) 2 1/2 (2.493/2.530) 11/64 (.136/.192) 188 265 5.3 1 1/8 1 1/4 (1.243/1.280) 2 3/4 (2.743/2.780) 11/64 (.136/.192) 220 225 4.5 1 1/4 1 3/8 (1.368/1.405) 3 (2.993/3.030) 11/64 (.136/.192) 260 190 3.8 1 3/8 1 1/2 (1.490/1.545) 3 1/4 (3.240/3.295) 3/16 (.153/.213) 333 150 3 1 1/2 1 5/8 (1.615/1.670) 3 1/2 (3.490/3.545) 3/16 (.153/.213) 385 130 2.6 1 5/8 1 3/4 (1.740/1.795) 3 3/4 (3.740/3.795) 3/16 (.153/.213) 448 115 2.3 1 3/4 1 7/8 (1.865/1.920) 4 (3.990/4.045) 3/16 (.153/.213) 500 100 2 1 7/8 2 (1.990/2.045) 4 1/4 (4.240/4.295) 3/16 (.153/.213) 569 90 1.8 2 2 1/8 (2.115/2.170) 4 1/2 (4.490/4.545) 3/16 (.153/.213) 630 79 1.6 2 1/4 2 3/8 (2.365/2.420) 4 3/4 (4.740/4.795) 7/32 (.193/.248) 826 60 1.2 2 1/2 2 5/8 (2.615/2.670) 5 (4.990/5.045) 15/64 (.210/.280) 961 52 1 2 3/4 2 7/8 (2.865/2.940) 5 1/4 (5.240/5.315) 1/4 (.228/.310) 1100 45 0.9 3 3 1/8 (3.115/3.190) 5 1/2 (5.490/5.565) 5/32 (.249/.327) 1300 43 0.8 *all weight and pcs count are approx. Bolt Size Inside Dia.(inch) Outside Dia.(inch) Thickness (inch) lbs per M pcs per 50 lbs pcs per lbs # 4 1/8 (0.120/0.133) 5/16 (0.307/0.320) 1/32 (.025/.040) 0.6 83,300 1666 # 6 5/32 (0.151/0.164) 3/8 (0.370/0.390) 3/64 (.036/.065) 1.3 39,500 790 # 8 3/16 (0.183/0.196) 7/16 (0.433/0.453) 3/64 (.036/.065) 1.7 29,500 585 # 10 7/32 (0.214/0.227) 1/2 (0.495/0.515) 3/64 (.036/.065) 2.3 22,750 435 # 12 1/4 (0.245/0.265) 9/16 (0.557/0.577) 1/16 (.051/.080) 3.4 14,700 280 1/4 9/32 (0.276/0.296) 5/8 (0.620/0.640) 1/16 (.051/.080) 4.5 11,100 222 5/16 11/32 (0.339/0.359) 11/16 (0.681/0.703) 1/16 (.051/.080) 5.2 9,750 192 3/8 13/32 (0.401/0.419) 13/16 (0.805/0.827) 1/16 (.051/.080) 7.2 7,000 140 7/16 15/32 (0.464/0.484) 59/64 (0.915/0.937) 1/16 (.051/.080) 9.5 5,500 105 1/2 17/32 (0.526/0.546) 1 1/16 (1.055/1.092) 3/32 (.074/.121) 18.3 2,800 55 9/16 19/32 (0.589/0.609) 1 3/16 (1.149/1.186) 3/32 (.074/.121) 23.4 2,250 43 5/8 21/32 (0.649/0.686) 1 5/16 (1.305/1.342) 3/32 (.074/.121) 27.7 1,850 36 3/4 13/16 (0.805/0.842) 1 1/2 (1.462/1.499) 9/64 (.108/.160) 47.4 1,050 21 7/8 15/16 (0.931/0.968) 1 3/4 (1.743/1.780) 9/64 (.108/.160) 63 775 16 1 1 1/16 (1.055/1.092) 2 (1.993/2.030) 9/64 (.108/.160) 83 585 12 1 1/8 1 1/4 (1.243/1.280) 2 1/4 (2.243/2.280) 9/64 (.108/.160) 109 460 9.2 1 1/4 1 5/16 (1.368/1.405) 2 1/2 (2.493/2.530) 5/32 (.136/.192) 160 335 6.3 1 3/8 1 7/16 (1.493/1.530) 2 3/4 (2.743/2.780) 5/32 (.136/.213) 190 275 5.25 1 1/2 1 9/16 (1.618/1.655) 3 (2.993/3.030) 5/32 (.153/.213) 240 230 4.25 Bolt Size Inside Dia.(inch) Outside Dia.(inch) Thickness (inch) *all weight and pcs count are approx. Standard Washers USS Flat Washer Actual Size Chart SAE Flat Washer USS Flat Washer TM QUICK REFERENCE GUIDE 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 Inside Dia. Outside Dia. Thickness 1 0 8 2 3 4 5 6 7 USS 8 323.262.0259 zalindustrial.com Fastener Catalog 2018.1