(주)동아

2000s ~ Present

2020s 2023.04 Certified by Europe EUROPE LRQA Verification B.V.[Certified item : ISO EN 14399-3/4/10 & 15048-1/2]
2021.05 Selection of "Global Small Businesses" designated by the Small and Medium Business Venture Business Administration

2010s 2019.12 2019 World's Best Products Certified by the Ministry of Trade, Industry and Energy
2018.07 [Company specializing in materials and parts] Certified
2018.05 Certified by Japan Minister of Land, Infrastructure and Transport [Certified item: Structural T/S bolt set (S10T)]
2017.09 Acquired INNO-BIZ certification for technological innovation
2016.12 ABS advanced heat treatment process approval
2016.10 Approval of DNVGL advanced heat treatment process
2016.09 17th Small and Medium Business Technology Innovation Exhibition Single PPM Quality Innovation [Presidential Commendation] Award
2015.07 Absorption and merger of JIN SUNG heat treatment Co., Ltd.
2014.08 Change of company name of DONGAH Co., Ltd. [Expand material heat treatment business field]
2014.07 Acquisition of CE certification
2012.12 49th Trade Day Awarded $5 Million Export Tower
2010.10 DONGAH Bolt Co., Ltd. changed its name.

2000s 2008.09 Acquired KEPIC (Power Industry Technology Standards) MN/SN certification
2005.07 Acquisition of ISO 14001 certification
2003.04 JIS B1186 (friction joint high tension bolt set) certified

1990s 1997.06 Patent for torque-sharing bolt defect detection equipment
Acquisition of ISO 9001 certification
1996.06 Patent for manufacturing high tension nuts using non-hard steel for hot forging
1995.10 Obtained heat treatment quality certification from Komatsu Corporation in Japan.
1994.06 Friction joint high tension set K mark obtained (KSB1010)
1994.04 Designation of an Selfcalibration inspection agency by the Industrial Development Administration
1994.02 Uncoated bolt patent
1991.12 Transferred to Changwon Bolt Factory