https://www.china-screw-factory.com/blog/ Screw specification and import guides from China Screw Factory en https://www.china-screw-factory.com/blog/how-to-choose-a-self-drilling-screw-drill-point/https://www.china-screw-factory.com/blog/how-to-choose-a-self-drilling-screw-drill-point/Wed, 28 Oct 2026 00:00:00 GMTDrill point #1 to #5 explained: which point drills which steel thickness, how to read a DIN 7504 size, and the mistakes that snap screws on site. https://www.china-screw-factory.com/blog/bi-metal-vs-stainless-vs-carbon-steel-roofing-screws/https://www.china-screw-factory.com/blog/bi-metal-vs-stainless-vs-carbon-steel-roofing-screws/Wed, 14 Oct 2026 00:00:00 GMTA practical comparison of carbon steel, solid stainless and bi-metal self-drilling screws: corrosion, drilling capacity, cost and where each one belongs. https://www.china-screw-factory.com/blog/screw-coatings-and-salt-spray-hours-explained/https://www.china-screw-factory.com/blog/screw-coatings-and-salt-spray-hours-explained/Wed, 30 Sep 2026 00:00:00 GMTZinc, yellow zinc, zinc flake, ceramic and Dacromet coatings compared, with what salt spray hours really tell you about outdoor life. https://www.china-screw-factory.com/blog/din-7504-vs-iso-15480-self-drilling-screw-standards/https://www.china-screw-factory.com/blog/din-7504-vs-iso-15480-self-drilling-screw-standards/Sat, 12 Sep 2026 00:00:00 GMTHow DIN 7504 K, M, N, O and P forms map to ISO 15480–15483, and what to write on a purchase order so you get the screw you expect. https://www.china-screw-factory.com/blog/coarse-vs-fine-thread-drywall-screws/https://www.china-screw-factory.com/blog/coarse-vs-fine-thread-drywall-screws/Wed, 26 Aug 2026 00:00:00 GMTWhen to use coarse thread, fine thread or drill point drywall screws, which length to buy, and why phosphate screws belong indoors. https://www.china-screw-factory.com/blog/how-to-import-screws-from-china/https://www.china-screw-factory.com/blog/how-to-import-screws-from-china/Sat, 08 Aug 2026 00:00:00 GMTMOQ, samples, specifications, inspections, packing, HS code 7318 and Incoterms: a step-by-step checklist for importing screws from China. https://www.china-screw-factory.com/blog/concrete-screw-installation-guide/https://www.china-screw-factory.com/blog/concrete-screw-installation-guide/Wed, 22 Jul 2026 00:00:00 GMTHow to install concrete and masonry screws correctly: drill bit size, embedment depth, edge distance, cleaning the hole and torque. https://www.china-screw-factory.com/blog/epdm-washer-guide-for-roofing-screws/https://www.china-screw-factory.com/blog/epdm-washer-guide-for-roofing-screws/Sun, 05 Jul 2026 00:00:00 GMTWhy EPDM is used for roofing screw washers, how to choose 14, 16 or 19 mm washers, and how to tell a correctly driven screw from an over-driven one.