Grade 8 Extra Heavy (Thick) SAE Flat Washers

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Grade 8 Extra Heavy SAE Flat Washers Data Sheet (PDF) - The Nutty Company

Bolt Tightening Torque Chart (PDF) - The Nutty Company

Grade 8 Extra Heavy (Thick) SAE Flat Washers

These extra heavy (thick) Grade 8 SAE flat washers are heat-treated alloy steel in the close-fitting SAE pattern, with extra thickness for high-load joints. They keep the bolt centered and will not dish under Grade 8 torque. They are a good fit for suspension parts, machine bases and spacers. Sizes run from 1/4" to 1", and the full dimensions with tolerances are in the table below.

Specifications

  • Material: heat-treated alloy steel, Grade 8
  • Pattern: SAE (close fit), extra heavy (thick)
  • Sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", 1"
  • Finish: yellow zinc plated
  • I.D., O.D. and thickness tolerances are in the table below

Dimensions

      Tolerence   Tolerence Thickness
Size Stock # I.D. + -  O.D. + - Min  Max 
1/4 HSFW814 0.281  0.015  0.005  0.625  0.015  0.005  0.090  0.110 
5/16 HSFW8516 0.344  0.015  0.005  0.688  0.015  0.007  0.090  0.110 
3/8 HSFW838 0.406  0.015  0.005  0.812  0.015  0.007  0.110  0.126 
7/16 HSFW8716 0.469  0.015  0.005  0.921  0.015  0.007  0.110  0.126 
1/2 HSFW812 0.531  0.015  0.005  1.062  0.030  0.007  0.156  0.188 
9/16 HSFW8916 0.594  0.015  0.005  1.156  0.030  0.007  0.156  0.188 
5/8 HSFW858 0.656  0.030  0.007  1.312  0.030  0.007  0.170  0.195 
3/4 HSFW834 0.812  0.030  0.007  1.469  0.030  0.007  0.170  0.195 
7/8 HSFW878 0.938  0.030  0.007  1.750  0.030  0.007  0.235  0.265 
1" HSFW81 1.062  0.030  0.007  2.000  0.030  0.007  0.235  0.265 

Common Uses

  • Suspension and steering components
  • Machine bases and heavy brackets
  • Precision spacers in Grade 8 joints

FAQ

How thick are these washers compared with a standard SAE washer?
They are noticeably thicker than a standard SAE washer of the same size. See the min/max thickness for each size in the table.

Extra thick SAE or USS?
Choose SAE for a close fit and smaller outside diameter. Choose USS when you want the biggest bearing surface.

Related: Grade 8 Extra Heavy (Thick) USS Flat Washers | Grade 8 SAE Flat Washers

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