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Structural Fasteners

  • BOLTS:

    • ASTM A325 Heavy Hex Bolts
      • Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength
    • ASTM A490 Heavy Hex Bolts
      • Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

     

    WASHERS: 

    • ASTM F436 Flat Washers
      • Hardened Steel Washers
    • ASTM F959 Direct Tension Indicators (DTIs)
      • Raised arches, or “bumps,” on washers that deform when a bolt is tightened sufficiently
      • Better than the turn-of-nut method for bolt tightening. Use a feeler gauge to check for proper tensioning
    • ASTM F959 Squirter Direct Tension Indicators (Squirter DTIs)
      • Like standard DTIs, with the addition of orange silicone that provides a visual indicator of correct tensioning—enabling quicker installation and inspection
    • Nuts
      • A563 Grade DH Heavy Hex Nuts
        • Carbon Steel Nuts
      • A194 Grade 2H Heavy Hex Nuts (acceptable substitute for A563 Grade DH)
        • Carbon Steel Nuts for Bolts for High Pressure or High Temperature Service