● 1997

"DTFLock®" trademark registered in China.

● 2000.10

The Transport Bureau of the Ministry of Railways issued the "Notice on Promoting the Application of Sapphire Locknuts in Railway Tracks" (Red Head Document of Yunji Line [2000] No.317)

● 2001.12

Detroit Shanghai was incorporated in Shanghai Jiading. Shanghai Detroit is the sole wholly-owned subsidiary of American SPIRALOCK in China, and the only wholly-owned company in the world that produces SPIRALOCK products.

● 2002.12

DTFLock® locknuts have been successfully applied to Shanghai maglev track beam steel structures, solving the problem of loosening fasteners by German engineers.

● 2002.10

Shanghai Detroit and Zhejiang Jinyilian won the bid for the fasteners of the Qinghai-Tibet Railway Construction Command of the Ministry of Railways, totaling 26.22 million yuan.

● 2003.12

The Transportation Bureau of the Ministry of Railways and the Department of Science and Technology of the Ministry of Railways jointly issued the "Notice on the Quality Inspection Results of the Use of DTFLock® Technology Lock Nuts" (Red Head Document of Yunji Line [2003] 453)

● 2003.12

Passed the ISO9001: 2000 quality system certification of Hong Kong Quality Assurance Bureau.

● 2004.6

The Transport Bureau of the Ministry of Railways issued the "Notice on Issuing the" Technical Conditions for Using Lock Nuts for Railway Tracks on the Road "(Interim)" (Red Head Document of Yunji Line [2004] No. 212)

● 2006.12

Chester Technology Corporation of the United States wholly-owned acquisition of Shanghai Detroit.

● 2007

Shanghai Detroit was awarded as Shanghai High-tech Enterprise.

● 2007.6

Beijing Aerospace Standards Inspection Center issued a "Preload Locked Threaded Nut Vibration Performance Test Report" for Shanghai Detroit's Spirax® Locknut after one year of testing.

● 2008

Shanghai Detroit and Shanghai Tongji University jointly established the “Detroit-Tongji Fastener Application Technology Center”.

● 2008.12

Detroit Shanghai has independently completed the Spirent® Thread Enterprise Standard, which includes a complete system of metric and imperial systems for gauges, taps and female female threads.

● 2008.12

Shanghai Detroit International Sales Department was established.

● 2009.1

Shanghai Detroit signed a technical development contract with the National Standard Product Quality Supervision and Inspection Center and Zhejiang University of Technology to jointly develop a lateral vibration testing machine for fasteners.

● 2009.3

Passed the TS16949: 2002 quality system certification of the French International Inspection Agency.

● 2009.3

Shanghai Detec has successfully developed a large-scale precision thread-guided tapping machine. Precision tapping of nuts up to M48.

● 2013.9.30

Shanghai Industrial and Commercial Bureau approved the formal change from "Shanghai Deite Precision Fastener Co., Ltd." to "Shanghai Deite Precision Fastener Co., Ltd.".

● 2014.02.21

Shanghai Detroit shares are listed for public transfer in the national stock transfer system. Stock abbreviation: Shanghai Detroit, stock code: 430646