Double Thread Sandwich Panel Screws | Landwide Roofing Fasteners
Professional double thread sandwich panel screws for roofing applications. Steel to steel & steel to wood solutions with drilling points #3-#6. Customizable lengths 50-300mm.
Double Thread Sandwich Panel Screw
C02
Sandwich Panel Screw
Double threaded or Sandwich panel screws are specialty fasteners for roofing panels. It is suitable for connecting different exterior roofing materials in sandwich panel construction. The versatility allows optimization for specific roofing assembly requirements.
The drilling point works on steel to steel structures. Point length is decided according to the light work or heavy work.
The sharp point or type 17 cutting point works on steel to wood structures.
Steel washer or Aluminum washer are available for selection. Different type of thread and point length available per customer environment requirement. Drilling point for capacity from 5mm to 12mm or thicker can be supplied, you could find solution by consulting Landwide sales team.
Landwide Screw DNA
- Suitable for exterior roofing environment.
- Many surface corrosion protection.
- Thread to point unique design provides quick and easy installation in the substrate without pre-drilling.
Coating
- 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
| DRILL POINT# | DRILLING CAPACITY |
|---|---|
| #3 | 5 MM (2+3) |
| #4 | 8MM |
| #5 | 12MM |
| #6 | >12MM |
Specifications
| DIAMETER | THREAD TYPE | LENGTH | POINT |
|---|---|---|---|
| M5.5 / M5.5 | B / C | 50MM – 300MM | #3 - #6 |
| M6.3 / M5.5 | B / B | 50MM – 300MM | #3 - #6 |
| M6.5 / M5.5 | A / B | 50MM – 300MM | #3 - #6 |
| M6.5 / M5.5 | A / C | 50MM – 300MM | #3 - #6 |
| #12 / #12 | B / C | 2" – 11" | #3 - #6 |
| #14 / #12 | B / B | 2" – 11" | #3 - #6 |
| #16 / #12 | A / B | 2" – 11" | #3 - #6 |
| #16 / #12 | A / C | 2" – 11" | #3 - #6 |
- Gallery
Double threaded Point 4 screw
Double threaded Point 4 screw
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What types of screws do you manufacture?
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How Do I Select the Right Drilling Point for Different Metal Thicknesses in Sandwich Panel Production?
Landwide provides drilling point options #3 through #6 to match your exact substrate thickness requirements—from 5mm (2+3) up to 12mm and beyond. Our technical team offers quick consultation to optimize point selection based on your light-work or heavy-work applications, ensuring efficient penetration and secure fastening. Contact us for customized drilling point recommendations tailored to your production specifications.
With 29 years of manufacturing expertise, Landwide Screw Co., Ltd. delivers comprehensive corrosion protection options including Mechanical Zinc, Zinc Plated Cr+3/Cr+6, Phosphated finishes, and Ruspert coatings rated from 500 to 1500 hours, plus Class 3 and Class 4 specifications for demanding exterior roofing environments. The thread-to-point unique design provides quick and easy installation without pre-drilling, reducing labor time and costs. Our experienced sales and production team offers technical consultation to match the precise drilling point length and thread configuration to your specific light-work or heavy-work applications, ensuring reliable fastening performance in residential and commercial building projects worldwide.