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Grade	Size Inches	Recommended A563 Nut				Washer
		Plain Finish		Hot-Dip or Mechanical Zinc Coated
		Grade	Style	Grade	Style
36	¹⁄₂ – 1¹⁄₂	A	Hex	A	Hex	F436
36	1⁵⁄₈ – 4	A	Heavy Hex	A	Heavy Hex	F436
55	¹⁄₂ – 1¹⁄₂	A	Hex	A	Heavy Hex	F436
55	1⁵⁄₈ – 4	A	Heavy Hex	A	Heavy Hex	F436
105	¹⁄₂ – 1¹⁄₂	D¹	Heavy Hex	DH²	Heavy Hex	F436
105	1⁵⁄₈ – 3	DH²	Heavy Hex	DH²	Heavy Hex	F436
¹ A563 grade D nuts are rarely available. A563 grade DH or A194 grade 2H should be substituted. ² The availability of A563 grade DH nuts in nominal sizes 1″ and larger is very limited and generally available only on special orders of 50,000 or more. For smaller quantities, ASTM A194 grade 2H should be considered.

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