Koolstofstaal bevestigingsmiddels, gr.4.8, gr.5.8, gr.6.8, gr.8.8, gr.10.8, gr.12.9, ASME B18.2.1 Hex Bouts ASME B18.2.2 Hex Nuts ASME B18.22.1, Stud Bolt, Hex Bolt with U-bout, seskant-sokdopskroef, seskantmoer, plat wasser, veerwasser.
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.