Tech-Stell Co. Ltd. is a company specializing in the design and manufacture of anti-loosening screws, nuts, and washers. Founded in 2003 by Chairman Morries Lin, TS has achieved a TÜV certification and is ISO 9001:2015 certified. Tech-Stell anti-loosening fasteners, including anti-loosening screws, nuts, and gaskets, passed stringent tests of certification institutions in the world; obtained a certificate for passing the US Aerospace NAS3350 vibration test; have NETIS certification by Japan's Ministry of Land, Infrastructure, Transport and Tourism; passed the Junker vibration test to DIN 65151; and got chosen for a domestic solar power project.