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Product Introduction
A Type 17 truss head self-tapping screw is a fastener with a wide, low-profile truss head, a sharp, fluted point, and a self-tapping thread for creating its own pilot hole in wood or thin metal, reducing installation time by eliminating the need for pre-drilling. The Type 17 designation refers to its unique point design for quick, self-centering starts and clearability of debris, while the truss head provides a large bearing surface to prevent the screw from pulling through thin materials.
Product Advantage
The primary advantages of a Type 17 truss head self-tapping screw are its self-drilling flute, which cuts its own pilot hole to prevent material splitting, its extra-wide, low-profile truss head, which distributes load and offers a flush finish, and its self-tapping capability, which eliminates the need for pre-drilling and tapping. This combination makes it ideal for fastening sheet metal or timber, especially in applications requiring a clean, strong, and efficient installation with minimal labor.
| Surface Finishing | Zinc or Ruspert Coating |
| Certification | ISO, GS, RoHS, CE, Cma |
| Material Standard | C1022A C10b21 |
| Standard | ASTM GB DIN ISO As3566 |
| Usage | Building,Decoration,Construction,Window |
| Length | 9mm-254mm |
| Drive | Torx |
| Transport Package | Export Shipping Standard Package |
| Specification | M3.5, M3.9, M4.2, M4.8, M5.5, M6.3 |
| Trademark | Donghuang |
| Origin | Zhejiang, China |
| HS Code | 73181400 |
| Production Capacity | 3000 Tons/Month |
Product Uses
Metal roofing and cladding:
They are ideal for fixing metal sheets, roofing, and cladding to timber purlins and battens.
Lightweight construction:
Suitable for building warehouses, carports, and backyard sheds.
General wood and panel applications:
Used for fastening liner panels and other general components to wood structures.
Electrical projects:
Can be used in electrical installations, particularly where metal is being fastened to timber.
Product Operate Guide
Select the Right Screw: Choose the appropriate Type 17 truss head self-tapping screw for the thickness and type of material you're joining.
Mark the Location: Clearly mark the spot where each screw should be placed.
Position the Screw: Place the screw's tip on the marked point.
Drive Slowly and Steadily: Using a power drill or manual screwdriver with a compatible bit, begin driving the screw in. The Type 17 point will automatically create the necessary pilot hole and threads.
Apply Steady Pressure: Apply consistent and even pressure as you drive the screw.
Check Alignment: Before the screw is fully tight, ensure the materials are correctly aligned.
Tighten Firmly (But Not Excessively): Continue to drive the screw until it is tight and the materials are secured. Be careful not to overtighten, as this can damage the material or strip the screw's threads.
FAQ
Q: What are they?
A: Self-tapping screws are designed to cut or form threads as they are screwed into a material.
Q: How do they work?
A: The sharp, pointed tip of the screw initiates the thread-cutting process.
As the screw is driven in, it forms or cuts threads into the material, creating a secure hold.
Q: What are they used for?
A: Joining materials where access is only available from one side.
Applications where pre-drilled holes are not feasible or practical.
Q: Do you need a drill?
A: While a drill can be helpful, especially for harder materials, you can typically install self-tapping screws with a screwdriver.
Q: Can they be used in aluminum?
A: Yes, self-tapping screws are suitable for aluminum and other metals.
They can be especially useful in applications with vibration, as their thread design can help prevent loosening.
Q: Can they be removed and reused?
A: Yes, self-tapping screws can be removed and reinstalled, often into the same threads. However, repeated removal and reinstallation can potentially damage the threads or material, especially in softer materials.
Q: What are the advantages?
A: Versatility across multiple materials.
Elimination of pre-drilled holes in many applications.
Secure fastening of materials.
Ability to be used in areas with limited access.
Q: What are the disadvantages?
A: Can be more difficult to install in harder materials.
Repeated removal and reinstallation can weaken the threads or damage the material.
May not be suitable for all applications, especially where extremely high loads or vibrations are present.
