DONGAH, The Republic of Korea - Komachine Supplier Profile and Product List

- DONGAH is a company that pioneered high-tension bolt production in Korea in 1961, specializing in high-tension bolts for steel structures, track bolts for heavy equipment, and industrial bolts and nuts. With over 60 years of accumulated technology and know-how, the company boasts proprietary Torque Control Bolt development and world-class heat treatment technology. It is expanding its business into global markets by supplying high-quality fastening components to various domestic and international industries.DONGAH is a company that pioneered high-tension bolt production in Korea in 1961, specializing in high-tension bolts for steel structures, track bolts for heavy equipment, and industrial bolts and nuts. With over 60 years of accumulated technology and know-how, the company boasts proprietary Torque Control Bolt development and world-class heat treatment technology. It is expanding its business into global markets by supplying high-quality fastening components to various domestic and international industries.
- High-tensile Bolts: Products for fastening steel structures in bridges and construction sites. The F10T model features a DIA range of M12-M30 and a LENGTH range of 30-300mm, adhering to standards such as KS B 1010, JIS B 1186, ASTM A325/A490, and EN 14399-3/4. The S10T (Torque Shear Bolt) model has a DIA range of M16-M30 and a LENGTH range of 40-300mm, complying with standards like KS B 2819, JIS Ⅱ-09, ASTM F1852/F2280, and EN 14399-10. Proprietary Torque Control Bolt technology developed domestically in 1993.High-tensile Bolts: Products for fastening steel structures in bridges and construction sites. The F10T model features a DIA range of M12-M30 and a LENGTH range of 30-300mm, adhering to standards such as KS B 1010, JIS B 1186, ASTM A325/A490, and EN 14399-3/4. The S10T (Torque Shear Bolt) model has a DIA range of M16-M30 and a LENGTH range of 40-300mm, complying with standards like KS B 2819, JIS Ⅱ-09, ASTM F1852/F2280, and EN 14399-10. Proprietary Torque Control Bolt technology developed domestically in 1993.
- Heavy Equipment Bolts: Track bolts for assembling tracks of construction heavy machinery. These products, with a DIA range of M12-M30 and a LENGTH range of 30-200mm, ensure tensile strength over 170,000 PSI and Rockwell HRC 38-42 hardness. Application of special process heat treatment technology, certified by the global brand Komatsu.Heavy Equipment Bolts: Track bolts for assembling tracks of construction heavy machinery. These products, with a DIA range of M12-M30 and a LENGTH range of 30-200mm, ensure tensile strength over 170,000 PSI and Rockwell HRC 38-42 hardness. Application of special process heat treatment technology, certified by the global brand Komatsu.
- HEX CAP SCREW(BOLT): Industrial bolt product line. With a DIA range of M6-M80 and a LENGTH range of 30-300mm, these screws conform to standards such as SAE J429, ASTM A193, A354, KS B1002, JIS B1180, ANSI/ASME B 18.2.1, DIN 931/933, BS3692A, and EN 15048-1/2.HEX CAP SCREW(BOLT): Industrial bolt product line. With a DIA range of M6-M80 and a LENGTH range of 30-300mm, these screws conform to standards such as SAE J429, ASTM A193, A354, KS B1002, JIS B1180, ANSI/ASME B 18.2.1, DIN 931/933, BS3692A, and EN 15048-1/2.
- HEX NUT: Industrial nut product line. Featuring a DIA range of M8-M80, these nuts comply with standards including KS B1012, JIS B1181, ASTM A194, A563, SAE J995, DIN 934, 6915, and BS 3692.HEX NUT: Industrial nut product line. Featuring a DIA range of M8-M80, these nuts comply with standards including KS B1012, JIS B1181, ASTM A194, A563, SAE J995, DIN 934, 6915, and BS 3692.
- Material Heat Treatment Technology: Expertise in heat treatment for bolt materials used in ship engine parts and other metal materials. Assurance of technological reliability through DNVGL and ABS marine class heat treatment process approvals.Material Heat Treatment Technology: Expertise in heat treatment for bolt materials used in ship engine parts and other metal materials. Assurance of technological reliability through DNVGL and ABS marine class heat treatment process approvals.
- Pioneering high-tension bolt production and over 60 years of accumulated technical know-how: As the first company to produce high-tension bolts in Korea in 1961, a strong company leading the technical standards of the domestic fastener market based on long-standing accumulated technology and expertise.Pioneering high-tension bolt production and over 60 years of accumulated technical know-how: As the first company to produce high-tension bolts in Korea in 1961, a strong company leading the technical standards of the domestic fastener market based on long-standing accumulated technology and expertise.
- Proprietary Torque Control Bolt development and quality certification: Development of Torque Control Bolts in Korea in 1993, with quality certified through numerous presentations and on-site tests, and application in many construction sites.Proprietary Torque Control Bolt development and quality certification: Development of Torque Control Bolts in Korea in 1993, with quality certified through numerous presentations and on-site tests, and application in many construction sites.
- World-class heat treatment process technology: A competitive advantage with special process heat treatment for heavy equipment track bolts, certified by Japan's Komatsu and exclusively supplied domestically. Enhanced technological reliability through DNVGL and ABS marine class heat treatment process approvals.World-class heat treatment process technology: A competitive advantage with special process heat treatment for heavy equipment track bolts, certified by Japan's Komatsu and exclusively supplied domestically. Enhanced technological reliability through DNVGL and ABS marine class heat treatment process approvals.
- Acquisition of various domestic and international standards and marine class certifications: Compliance with and certification of numerous international standards including ISO, KS, JIS, EN, and ASTM, strengthening product reliability and quality competitiveness. Establishment of a foundation for overseas market entry through Japanese Ministry of Land, Infrastructure, Transport and Tourism certification and European CE certification.Acquisition of various domestic and international standards and marine class certifications: Compliance with and certification of numerous international standards including ISO, KS, JIS, EN, and ASTM, strengthening product reliability and quality competitiveness. Establishment of a foundation for overseas market entry through Japanese Ministry of Land, Infrastructure, Transport and Tourism certification and European CE certification.
- Expansion into global markets and continuous technological innovation efforts: Increased export volumes to overseas markets including the United States, Japan, and Southeast Asia. Continuous efforts to secure internal and external competitiveness through ongoing technology research and development and quality assurance activities.Expansion into global markets and continuous technological innovation efforts: Increased export volumes to overseas markets including the United States, Japan, and Southeast Asia. Continuous efforts to secure internal and external competitiveness through ongoing technology research and development and quality assurance activities.
- Steel bridge and steel structure construction sites: Supply of high-tension bolts for fastening large steel structures such as bridges and buildings.Steel bridge and steel structure construction sites: Supply of high-tension bolts for fastening large steel structures such as bridges and buildings.
- Construction heavy equipment industry: Supply of track bolts for assembling tracks of construction heavy machinery like excavators.Construction heavy equipment industry: Supply of track bolts for assembling tracks of construction heavy machinery like excavators.
- Ship engine parts manufacturing: Provision of bolts for ship engine parts and material heat treatment services.Ship engine parts manufacturing: Provision of bolts for ship engine parts and material heat treatment services.
- Steelmaking facilities and ROLL sector: Supply of bolts for steel mill equipment and ROLL parts, and application of material heat treatment technology.Steelmaking facilities and ROLL sector: Supply of bolts for steel mill equipment and ROLL parts, and application of material heat treatment technology.
- Offshore plant industry: Supply of high-tension fastening components required for offshore structure and plant construction.Offshore plant industry: Supply of high-tension fastening components required for offshore structure and plant construction.
- Nuclear power industry: Capability to supply components for nuclear power generation facilities through KEPIC (Korea Electric Power Industry Code) MN/SN certification.Nuclear power industry: Capability to supply components for nuclear power generation facilities through KEPIC (Korea Electric Power Industry Code) MN/SN certification.
- Japan, Southeast Asia, India, Vietnam, ChinaJapan, Southeast Asia, India, Vietnam, China
- EuropeEurope
- United StatesUnited States
- ChileChile
- ISO 9001 Quality Management System Certification.ISO 9001 Quality Management System Certification.
- ISO 14001 Environmental Management System Certification.ISO 14001 Environmental Management System Certification.
- KS B1010 KS Mark for Friction Joint High-Tensile Bolt Sets.KS B1010 KS Mark for Friction Joint High-Tensile Bolt Sets.
- JIS B1186 Certification for Friction Joint High-Tensile Bolt Sets.JIS B1186 Certification for Friction Joint High-Tensile Bolt Sets.
- European Certifications (EN 14399-3/4/10 & EN 15048-1/2) Acquisition.European Certifications (EN 14399-3/4/10 & EN 15048-1/2) Acquisition.
- Japanese Ministry of Land, Infrastructure, Transport and Tourism Certification (Structural T/S Bolt Set S10T) Acquisition.Japanese Ministry of Land, Infrastructure, Transport and Tourism Certification (Structural T/S Bolt Set S10T) Acquisition.
- DNVGL Marine Class Heat Treatment Process Approval.DNVGL Marine Class Heat Treatment Process Approval.
- ABS Marine Class Heat Treatment Process Approval.ABS Marine Class Heat Treatment Process Approval.
- KEPIC (Korea Electric Power Industry Code) MN/SN Certification Acquisition.KEPIC (Korea Electric Power Industry Code) MN/SN Certification Acquisition.
- Innovation-type Small and Medium Business (INNO-BIZ) Certification Acquisition.Innovation-type Small and Medium Business (INNO-BIZ) Certification Acquisition.
- Material and Parts Specialist Company Certification Acquisition.Material and Parts Specialist Company Certification Acquisition.
- 2019 World-Class Product Selection Certified by the Ministry of Trade, Industry and Energy.2019 World-Class Product Selection Certified by the Ministry of Trade, Industry and Energy.
- Designated as a 'Global Hidden Champion' by the Ministry of SMEs and Startups.Designated as a 'Global Hidden Champion' by the Ministry of SMEs and Startups.
- Presidential Commendation for Single PPM Quality Innovation at the 17th SME Technology Innovation Awards.Presidential Commendation for Single PPM Quality Innovation at the 17th SME Technology Innovation Awards.
- Awarded the 10 Million Dollar Export Tower at the 56th Trade Day.Awarded the 10 Million Dollar Export Tower at the 56th Trade Day.
- Awarded the 5 Million Dollar Export Tower at the 49th Trade Day.Awarded the 5 Million Dollar Export Tower at the 49th Trade Day.
- Patent for Torque Shear Bolt Defect Detection Device (June 1997).Patent for Torque Shear Bolt Defect Detection Device (June 1997).
- Patent for Manufacturing Method of High-Tensile Nuts using Non-Heat-Treated Steel for Hot Forging (June 1996).Patent for Manufacturing Method of High-Tensile Nuts using Non-Heat-Treated Steel for Hot Forging (June 1996).
- Patent for Uncoated Bolt (February 1994).Patent for Uncoated Bolt (February 1994).