Wafer Head Self Drilling Screw for Fast Metal-to-Metal Installation
|
Size(mm) |
Size(inch) |
Size(mm) |
Size(inch) |
|
3.9x13 |
#7x1/2 |
4.2x13 |
#8x1/2 |
|
3.9x16 |
#7x5/8 |
4.2x16 |
#8x5/8 |
|
3.9x19 |
#7x3/4 |
4.2x19 |
#8x3/4 |
|
3.9x25 |
#7x1 |
4.2x25 |
#8x1 |
|
3.9x32 |
#7x1-1/8 |
4.2x32 |
#8x1-1/8 |
|
3.9x38 |
#7x1-1/2 |
4.2x38 |
#8x1-1/2 |
|
3.9x41 |
#7x1-5/8 |
4.2x41 |
#8x1-5/8 |
|
3.9x45 |
#7x1-3/4 |
4.2x45 |
#8x1-3/4 |
|
3.9x50 |
#7x2 |
4.2x50 |
#8x2 |
Wafer head self drilling screws are designed for fast and efficient fastening in metal-to-metal applications. The integrated drill point allows drilling, tapping, and fastening in a single operation, significantly improving installation efficiency on-site.
The wide wafer head provides a larger bearing surface, ensuring better clamping force and reducing the risk of material deformation.
|
Material |
Carbon C1022 Steel, Case Harden&Stainless Steel |
|
Head Type |
Wafer Truss head |
|
Thread Type |
full thread, partial thread |
|
Surface Finish |
Black/grey phosphate, White/yellow zinc plated, Nickel, Ruspert. |
|
Diameter |
#7 (3.9mm), #8 (4.2mm), #10(4.8mm), |
|
Point |
Drilling Tail |
|
Standard |
Din 7504T |
|
Non-standard |
OEM is available if you provide drawings or samples. |
|
Packing |
box, bulk in carton or bags ,polybag or Customer request |
Key Features
Low-Profile Head
Wide, thin head provides strong hold-down without protrusion.
Self-Drilling Tip
Eliminates the need for pre-drilling, saving time and labor.
Wide Bearing Surface
Distributes load evenly across panels and thin sheets.
Anti-Pull-Through Design
Ideal for soft or thin sheet materials.
Multiple Coatings
Zinc-plated, black phosphate, Ruspert, or stainless steel for corrosion protection.
Versatility
Available with cross-recess (Phillips), square, or Torx drive.
Applications of Wafer Head Self-Drilling Screws
HVAC Ducting
Fastening sheet metal ducts with flush finish.
01
Electrical Assemblies
Securing panels, junction boxes, and enclosures.
02
Insulation & Cladding
Fixing insulation boards and thin sheets without damage.
03
Furniture & Fixtures
For decorative low-profile fastening.
04
Light Construction
General sheet-to-sheet fastening where a neat finish is required.
05
Sheet metal Fastening
Metal Roofing Installation
Warehouse And Carpot Construction
The wafer head self-drilling screw-also called a pancake head tek screw or low-profile drilling screw-is the ideal choice when you need flush fastening with strong hold-down power.
From HVAC ducting to electrical enclosures and cladding systems, these screws combine clean appearance, load distribution, and drilling efficiency in one fastener.
With multiple names, finishes, and applications, wafer head screws are a reliable option for both industrial and construction use, making them a staple fastener across industries.
Salt Spray Test (Corrosion Resistance)
Zinc plated: 48 – 72 hours
Ruspert coating: 500 – 1000 hours
Dacromet coating: 500+ hours
Suitable for outdoor and high-humidity environments depending on coating selection.
Packaging & Supply
Bulk packing / small box packing available
Custom labeling supported
Stable supply for large projects
Pull-Out Strength
0.6mm steel sheet: ≥ 1.2 kN
1.0mm steel sheet: ≥ 1.8 kN
1.5mm steel sheet: ≥ 2.5 kN
Provides reliable holding performance for thin metal applications.
How to Choose the Right Self Drilling Screw
Thickness of material → choose drill point
Environment → coating selection
Load requirement → screw diameter
Installation type → head type
Self Drilling Screw vs Self Tapping Screw
| Feature | Self Drilling | Self Tapping |
|---|---|---|
| Pre-drilling | Not needed | Required |
| Speed | Fast | Slower |
| Application | Metal | Wood/plastic |
Surface Coating Options
Zinc plated (indoor use)
Ruspert coating (outdoor use)
Dacromet coating (high corrosion resistance)
Q1: What Is A TEK Screw?
A TEK screw (self-drilling screw) is designed with a drill point that allows fastening into metal without pre-drilling, improving installation efficiency.
Q2: What Thickness Of Steel Can It Drill?
Different drill points are suitable for different thicknesses:
#2 point: up to 2.0mm
#3 point: up to 3.5mm
#4 / #5 point: heavy-duty steel applications
Q3: What Materials Are Available?
We supply carbon steel (C1022A) with zinc coating and stainless steel (SS410/304) depending on corrosion resistance requirements.
Q4: Are Wafer Head Screws Suitable For Roofing?
Wafer head screws are mainly used for metal-to-metal fastening where a low-profile head is required, such as steel structures and panels.
For roofing, hex washer head screws with EPDM are more commonly used.
Get A Quote Now
Send us your required size, quantity, and application.
Our team will provide a detailed quotation, technical recommendation, and sample support within 12 hours.
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