Hex Washer Head Type 17 Self Tapping Screw for Wood and Roofing

                                               Hex Washer Head Type 17 Self Tapping Screw

Product Overview

Type 17 self tapping screws are designed mainly for timber applications. The sharp cutting flute at the tip allows the screw to remove material during installation, reducing splitting and eliminating the need for pre-drilling in most wood applications.

Compared with standard self tapping screws, Type 17 offers faster penetration and cleaner threads, especially in hardwood and dense timber.

Key Features

Cutting flute point (Type 17) reduces splitting in wood

Faster installation without pre-drilling

Hex washer head provides strong clamping force

Suitable for high torque applications

Available with corrosion-resistant coatings for outdoor use

Technical Specifications

Diameter: M4.8 / M5.5 / M6.3

Length: 19mm – 150mm

Head Type: Hex Washer Head

Drive Type: External Hex

Material: Carbon Steel (C1022)

Heat Treatment: Case Hardened

Surface: Zinc Plated / Ruspert / HDG

Typical Applications

This type of screw is widely used in:

Timber construction

Roofing structures with wooden base

Wooden pallets and packaging

Fence and outdoor wood structures

For steel structures, self drilling screws (TEK screws) are recommended instead.

Surface Treatment Options

Different markets require different coatings:

Zinc Plated → indoor use

Ruspert Coating → high corrosion resistance (500–1000 hours)

Hot Dip Galvanized → heavy outdoor / coastal projects

We can recommend coating based on your project environment.

Type 17 vs Self Drilling Screw

Many buyers confuse Type 17 screws with self drilling screws.

The key difference:

Type 17 → for wood (cutting flute)

Self drilling screw → for steel (drill point)

If your application involves steel or metal sheets, choosing a drilling screw is more efficient and safer.

FAQ

Q1: Can Type 17 screw be used for steel?
Not recommended. It is designed for wood. For steel, use self drilling screws.

Q2: Do I need pre-drilling?
In most timber applications, no pre-drilling is required.

Q3: What is the advantage of hex washer head?
It provides better load distribution and stronger fastening compared to pan head or countersunk head.

Q4: Can you supply OEM packing?
Yes, we provide OEM packing with your brand and customized labels.

Packaging & Supply

Standard packing: bulk / small box / bucket

MOQ: flexible based on size

Lead time: usually 20–30 days

Samples: available upon request

Buyer's Common Questions

Is this screw suitable for outdoor use?
Yes. With proper surface treatment such as zinc plating or Ruspert coating, the screw can be used in outdoor environments.

Can the washer be supplied with EPDM?
Yes. EPDM bonded washers are available upon request for sealing and waterproof applications.

Do you support OEM branding and packaging?
Yes. OEM logos, packaging design, and customized specifications are supported.

Type 17 vs Drill Point – Application Comparison

Call to Action

If you are sourcing Type 17 self tapping screws for timber or roofing projects, feel free to contact us.
We can recommend the right size, coating, and packing based on your market.

Send us your inquiry and get a quick quotation.

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