Grade Markings for Steel Fasteners

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Bolt Grade Markings and Tensile Strength - SAE and ASTM.

  • Bolts,Screws,Studs with 3 symmetrical tick marks on the head = Grade 5
  • Bolts,Screws,Studs with 5 symmetrical tick marks on the head = Grade 7
Last modified on 10 June 2019, at 16:13