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  1. A449 Standard Specification for Hex Cap Screws, Bolts and Studs, …

  2. Types - A449 Bolts

  3. ASTM Fastener Standards Specifications For A449 Hardware - All …

  4. ASTM A449

  5. Weathering Steel Bolt and Hardware Chart - DIS-TRAN Steel

  6. A449 Bolts - A449 Bolts

    Type 3 is made from weathering steel that also undergoes a heat-treating process. Type 3 material has natural corrosion-resistant chemical properties preventing the material from rusting in outdoor elements.