Guangdong STL Fastening System Co., Ltd. is an integrated manufacturer specializing in professional anti-loosening washers. To meet market demands, we operate an international business center in Hong Kong and maintain a large-scale production base in Yangjiang. In the face of intense market competition, we are committed to sustainable development through continuous technological innovation and improvements in manufacturing capabilities.

Our steady development strategy focuses on increasing investment and enhancing management practices to boost our core competitiveness. With a spirit of dedication and ingenuity, we aim to deliver products of stable and reliable quality to the market. Centered in Yangjiang but with a global outlook, we prioritize cooperation and sharing, staying true to our original mission.

After years of hard work and development, our SZJYD-LOCK brand has established a strong reputation for quality within the industry. Our special performance anti-loosening washers have received quality certifications from reputable third-party organizations, including the Machinery Research Institute, CRCC Railway Inspection Station, Swiss SGS, and TÜV South Germany.

STL anti-loosening washers are widely used in safety equipment across various sectors, including rail transit, railway locomotives, shipbuilding, wind energy, large offshore platforms, and mining machinery. We have successfully partnered with renowned organizations such as China CRRC Group, China Railway Electrification Bureau Group, Bombardier (Canada), GEA (Germany), Rotork (UK), PANDROR Railway (UK), DELACHAUX Ben Laixiu Group (France), Vossloh Group (Germany), and Fuller Company (Canada).

We remain committed to technological innovation and integrity in management. We warmly invite users at home and abroad to join us for cooperation, mutual benefit, and shared development!