ASTM F436 Washer: Dimensions & Specifications

ASTM F436 Round Structural Washers Drawing

          ASTM F436 Round Structural Washers (ASTM F436)

 Bolt Size

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Outside Diameter (OD)

Inside Diameter (ID)

Thickness(TH)
Max Min Max Min Max Min
1/2 1.094 1.031 .562 .531 .177 .097 
5/8 1.344 1.281 .719 .687 .177 .122 
3/4 1.500 1.438 .843 .812 .177 .122 
7/8 1.781 1.719 .969 .938 .177 .136 
1 2.031 1.969 1.156 1.125 .177 .136 

 


Description


Dimensionally similar to the USS plain washer, but with a small outer diameter, produced from a greater steel grade and heat-treated.

Applications/
Advantages


Designed for A325 & A490 structural bolts.


Material

Structural washers made from steel is of the following for chemical composition requirements: Phosphorous- 0.050% ; Sulfur-0.060%.
Hardness

Rockwell C38-45
Plating

Usually structural washers are plain or furnished with a galvanized finish.