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  • ASTM A193 L7
  • ASTM A193 B7
  • DIN439
  • ANSI B18.2.2-HEAVY SERIES
  • ANSI B18.2.2
  • DIN562
  • DIN557
  • JIS B1181 M5-M90
  • U-Round Bolts Bule-Zinc Plated
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