(주)동아

2000s ~ Present

2020s 2023.04 Acquired certification of CE (EN 14399-1/3/4/5/6/10 & 15048-1 & A325, A490)
2021.05 Selected as a global small giant by th Ministry of SMEs and Startups

2010s 2019.12 Won the trophy for exporting $10,000,000 worth of products at the 56th Trade Day ceremony
2019.11 Selected as World Class Product [Set of Tor-shear Type High Strength Bolt, Hexagon Nut and Plain Washer for Structure Joints]
2018.07 Selected as a company specialized in materials and parts by Ministry of Trade, Industry and Energy
2018.05 Obtained the certificate of JSS Ⅱ - 09 S10T high tension bolt from the minister of Japan National Transportaion
2017.09 Obtained Certificate(INNO-BIZ) for a technical innovation corporation
2016.12 ABS ship classification heat treatment process approval
2016.10 DNVGL ship classification heat treatment process approval
2016.09 17th SME Technology Innovation Exhibition Presidential Citation for [Single PPM Quality Innovation]
2015.07 A merger with Jinsung Heat-Treatment Co., Ltd
2014.08 Changed the name to Dong Ah CO., Ltd(extension of business for Metal Heat Treatment)
2014.07 Obtained certification for CE
2012.12 Won the trophy for exporting $5,000,000 worth of products at the 49th Trade Day ceremony
2010.10 Change of company name“Dong Ah Bolt Co., Ltd”

2000s 2008.09 Obtained the certification of Korea Electric Power Industry Code(KEPIC)
2005.07 Obtained the authorization of ISO 14001 (Environment Management) from TUV BAYERN SACHSEN in Germany
2003.04 Obtained the authorization of JIS MARK CERTIFICATE (JIS B 1186) for set of High Strength Hexagon Bolt, Nut and Plain washers for Friction Grip Joints

1990s 1997.06 Obtained the authorization of ISO 9001 (Quality Management) from TUV BAYERN SACHSEN in Germany
Acquisition of ISO 9001 certification
1996.06 Patent for high-tensile nut manufacturing method using non-tempered steel for hot forging
1995.10 Obtained KOMATSU Certificate of Heat treatment for Track bolt & nut from KOMATSU OSAKA PLANT
1994.06 Obtained the authorization of using korean standard symbol mark(K.S MARK) for set of High Strength Hexagon Bolt, NUT and Plain Washer for Frction Grip Joints(KSB 1010)
1994.04 Designated as a self-calibration inspection institution by the Industrial Promotion Administration
1994.02 Unpainted bolt patent
1991.12 Moved to Changwon Bolt Factory

1967.05 Obtained the authorization of using korean standard symbol mark(K.S MARK) for bolt, nut and rivet from Korean government.