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ASTM A449

  • Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 KSI Minimum Tensile Strength, General Use.

    A449 Type 1 Mechanical Properties

    Diameter Tensile, Ksi, Min Yield, Ksi, Min Elongation % Min
    1/4" to 1" 120 92 14
    1-1/8" to 1-1/2" 105 81 14
    1-5/8" to 3" 90 58 14
  • A449 Type 1 Chemical Properties

    Element Carbon Steel % Alloy Steel %
    Carbon 0.30 to 0.52 0.30 to 0.52
    Manganese, Min 0.60 0.60
    Phosphorus, Max 0.040 0.035
    Sulfur, Max 0.050 0.040
    Silicon 0.10 to 0.30 0.15 to 0.35
  • A449 Type 1 Recommended Hardware

    Finish Diameter Nut Washer
    Plain 1/4" to 1-1/2" A563B Hex F436
    Plain 1-5/8" to 3" A563DH Heavy Hex F436
    Hot Dip Galvanized 1/4" to 3" A563DH Heavy Hex F436

    Nuts of other grades and styles having specified proof load stresses (specification A563, Table 3) greater than the specified of nut are suitable.

  • The provided information was taken directly form the listed ASTM Standard, Additional information can be found in ASTM A449-10.

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