[INQ. NO. 2408M05] DONGAH Co., Ltd. began producing high-strength bolts for friction joints for steel bridges and steel structures in its Yeongdeungpo Factory in Seoul, the first in Korea, in 1961, and established factory automation with more modern facilities.
DONGAH developed torque control bolts by itself in 1993, and the quality of these products has been verified through several briefing sessions and on-site testing, and they are thus being applied and installed in many construction sites.

High-strength bolt set (S10T, F10T) for construction
High-strength bolts are used for fastening steel bridges and steel structures in construction sites.
DONGAH currently has approximately 50% of the domestic market share, and is increasing customer satisfaction with high-quality levels and flexible responses to customer needs.
These bolts have successfully entered the Japanese market, which is strict in terms of quality, and have obtained the certification of the Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT).
DONGAH realizes high customer satisfaction with price-competitiveness and quick delivery response, and it is opening up new markets through development of A325 & A490 to respond to various customer needs.

Bolt nuts (Track bolt nut, Plow bolt nut) for heavy equipment
Bolt bolts are used for assembling heavy equipment’s rail tracks for construction.
Currently, they are being supplied as OEMs to Hyundai Steel of Korea and TOPY of Japan, and are also sold in the global A/S markets.
These products are being produced by using DONGAH’s excellent heat-treatment technology that can satisfy all mechanical properties required by customers.
DONGAH stands out from its competitors with its quality reliability, and secures global A/S sales networks through OEM supply to global heavy-equipment manufacturers like CATERPILLAR and KOMATSU.

DONGAH is also preparing to sell the recently developed plow bolt in Europe and the Americas.
Thanks to the technology and know-how accumulated for over 60 years, the company’s quality of the special process heat-treatment of track bolts for the assembly of heavy equipment rail tracks has been widely recognized, and the export volumes are increasing in the USA, Japan, and Southeast Asia.
In order to reward customers with better quality, Dong-A is producing the best bolts and nuts in Korea with top quality by obtaining ISO/KS/JIS/EN certification.

 
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