1987.3
      Establishment of Daewoo Bolt Enterprise (#610-8 Guro-dong, Guro-gu, Seoul)
1994.4
      Expansion of facilities and transfer (# 594-1 Bulro-ri, Geomdan-myeon,
      Kimpo-gun, Gyeonggi-do) - 6,000 tons per annum
      New installation of anchor bolt manufacturing facility - 1,000 tons/yr
1996.4
      Expansion of facilities and transfer (#223-287 Seoknam-dong, Seo-gu,
     Incheon Metropolitan City)- 10,000 tons/yr
     Expansion of anchor bolt and ROD BAR manufacturing facility - 2,000 tons/yr
1997.6
     Acquisition of KS A 9002/IOS 9002 Quality System Certification
1997.9
     Conversion of the company into a corporation, Daewoo Bolt Co., Ltd.
1998.11
      Acquisition of KS B 1002 hexagonal bolt mark License and Certification
1999.6
     Expansion of anchor bolt and mass-produced bolt manufacturing
     facility - 4,000 tons per annum
2000.6
      Manufacturing and supply of high-strength flange bolt for 756KV
      power transmission steel tower
2001.3
     Expansion of nut manufacturing facility - 2,400 tons per annum
2002.6
      Acquisition of KS B 1012 hexagonal nut mark License and Certification
      Acquisition of KS B 1016 foundation bolt mark License and Certification
      Acquisition of KS B 1062 welding stud bolt mark License and Certification
2002.7
     Acquisition of KS A 9001/ISO 9001 Certification
2004.1
      New construction of and transfer to Dangjin Factory
      (#703-9 Geosan-ri, Shinpyeong-myeon, Dangjin-gun - 6,800 pyeong)
2004.6
      KS B 1010 high-tensile bolt for friction adhesion mark License and Certification
2004.7
      Expansion of facility for parts former (580SS) - 16,800 tons per annum
      Total annual quantity of bolt, nut and anchor bolt production - 33,200 tons
2005.12
      Expansion of continuous thermal processing furnace - 3,000 tons per annum
2007.10
      Expansion of facility for bolt former (460SSL) - 18,000 tons per annum
      Total annual quantity of bolt, nut and anchor bolt production - 51,200 tons