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China Factory Directly Sale DIN653 Knurled Head Screws

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October 19, 2026
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Video Description:
Follow along for a hands-on demonstration inside Ningbo Yongbiao Fastener Manufacturing Co., Ltd., a 2,000+ sqm factory in Ningbo, China. This walkthrough shows how DIN653 knurled head screws are produced—from raw material to finished stock—highlighting production equipment, testing processes, and the CNC machining area used for custom fastener requests. See how the factory manages standard parts, bolts, screws, nuts, and washers for automotive, machinery, electronics, and new energy applications, with normal delivery in 20–30 days and stock items in 1–5 days. A clear, practical look at real manufacturing capability and quality control for international B2B buyers.
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