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F1554 Grade 105 Hardware Recommendations

Grade Identification Size, Inches Recommended A563 Nut Washer
Plain Finish Hot-Dip or Mechanical Zinc Coated
Grade Style Grade Style
105 ASTM F1554 Grade 105 1/2 – 1-1/2 D1 Heavy Hex DH2 Heavy Hex F436
1-5/8 – 3 DH2 Heavy Hex DH2 Heavy Hex
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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