DOUBLE THREAD / Landwide Screw is not only a screw factory but also a consultant, service provider assisting partners all over the world to find suitable solution in their fastener business for 29 years

Made in Taiwan DOUBLE THREAD supplies. Screws made with special coating, ISO processes. 25 years screws manufacturing for roofing, decking, miscellaneous uses, etc. Screws with special plating and coating including zinc, nickel and chrome. Great selection of screws: self drilling screws, self tapping screws, concrete screws, roofing screws, flange washer head screws, stainless steel screws and more.

Top choice of screw

DOUBLE THREAD - Roofing screw
  • DOUBLE THREAD - Roofing screw

Roofing Screw


Double thread screw manufactured by Landwide are suitable for exterior roofing environment. Provide surface coating per customer request for surface corrosion protection.

Different type of thread and point length available per customer environment requirement. From light work to heavy work, you could find solution by consulting Landwide sales team.

And thread to point unique design provides quick and easy installation in the substrate without pre-drilling.

  • Mechanical Zinc, Zinc Plated Cr+6 , Zinc Plated Cr+3, Zinc Yellow Cr+3, Zinc Yellow Cr+6, Grey Phosphated, Black Phosphated, Ruspert 500HRS, Ruspert 1000HRS, Ruspert 1500HRS, Class 3, Class 4, Other Special Coating
Point Selection



5 MM(2+3)







M5.5 / M5.5B / C50MM – 300MM#3 - #6
M6.3 / M5.5B / B50MM – 300MM#3 - #6
M6.5 / M5.5A / B50MM – 300MM#3 - #6
M6.5 / M5.5A / C50MM – 300MM#3 - #6
#12 / #12B / C2" – 11"#3 - #6
#14 / #12B / B2" – 11"#3 - #6
#16 / #12A / B2" – 11"#3 - #6
#16 / #12A / C2" – 11"#3 - #6
Related Products
Frequently Asked Questions
What are your ranges of manufacture sizes of screws?

Dia: 3.0mm-16.0mm (Min.-Max.) Length:5.0mm-300.0mm (Min.-Max.)

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DOUBLE THREAD | Landwide Screw - A professional screw factory provide standard screw, non-standard screw and also R&D service to world fastener business.

Located in Taiwan R.O.C. since 1992, Landwide Co., Ltd. is a DOUBLE THREAD | screw manufacturer that is specialized in providing screws with ISO manufacturing, great range of tek screws, materials & grades, high strength, custom design, special coating, packaging and value-added services.

Landwide screw with 29 years of screw manufacturing experience, specialized in all kinds of standard and non-standard screws. Especially, we are keeping the R&D effort for other special specification and custom made products which continuously help partners create unique market position in this competitive industry. In Landwide, customer is at the heart of our business model which includes outstanding quality, professional consultant, on time delivery and competitive price.

Landwide has been offering worldwide customers high-quality screws & bolts, both with advanced technology and 29 years of experience, Landwide ensures each customer's demands are met.