Have Any Questions? Contact Us! (800) 273 - 8640


  • Standard Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength.

  • A307 Grades

    Grade Description
    A Bolts and studs having a minimum tensile strength of 60 ksi and intended for general applications.
    B Bolts and studs having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges.
    C Replaced by Specification ASTM F1554-36
  • A307 Mechanical Properties

    Grade Tensile Ksi Yield Ksi, Min Elongation %, Min
    A 60 Min N/A 18
    B 60 - 100 N/A 18
    C See F1554-36 See F1554-36 See F1554-36
  • A307 Chemical Properties

    Element Grade A Grade B Grade C
    Carbon, Max 0.29% 0.29% See F1554-36
    Manganese, Max 1.20% 1.20% See F1554-36
    Phosphorus, Max 0.04% 0.04% See F1554-36
    Sulfur, Max 0.15% 0.05% See F1554-36
  • A307 Recommended Hardware

    Fastener Grade and Size Nut Grade and Style Washer
    A: 1/4" to 1-1/2" A563A Hex F844
    A: 1-1/2" to 4" A563A Heavy Hex F844
    B: 1/4" to 4" A563A Heavy Hex F844
    C See F1554-36 See F1554-36
  • The provided information was taken directly form the listed ASTM Standard, Additional information can be found in ASTM A307-10.