100x SELF-TAPTING SCREWS 4.2X13 flat head - WSPC premium sheet metal washer screws
Are you looking for a reliable, fast and extremely strong solution for joining sheet steel or other materials? 100x self-tapping screws 4.2x13 with flat head (WSPC) are an indispensable tool for every professional craftsman, installer and DIYer. These high-quality self-drilling screws are specially designed for overlapping fastening of steel sheets and ensure maximum stability, long service life and an aesthetically pleasing result.
Thanks to their advanced design with a special self-drilling tip, these screws significantly speed up the workflow as no pre-drilling is required. Whether you are assembling furniture, manufacturing metal structures, repairing car parts or covering sheet metal, this 100-piece set will meet all your expectations in terms of strength and durability.
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Key advantages of 4.2x13 flat head self-tapping screws

Self-drilling tip for fast work: The special tip allows easy and quick penetration through the material without pre-drilling, saving you time and effort when working.
Exceptional drilling performance: The screws are capable of easily drilling through steel sheet up to 2 mm thick.
Perfect pressure with a cylindrical head: The wide flat head (washer diameter ø 11.5 mm) acts as an integrated washer, ensuring adequate pressure on the fastened element and preventing material deformation.
Superior corrosion protection: They are made of high-quality galvanized carbon steel, which ensures high resistance to rust, corrosion and external influences.
Professional and aesthetic appearance: The flat head fits snugly against the surface of the material, giving the finished product a clean, straight and professional appearance without protruding parts.

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Versatile use in the workshop and in the field
These WSPC self-drilling washer screws are extremely versatile. They are primarily intended for projects involving sheet steel as a substrate, but they also work well with other materials:

Assembly and joining of steel sheets up to 2 mm thick.
Production and installation of metal structures and profiles.
Assembly and repair of metal and wooden furniture.
Auto bodywork and auto parts repairs.
General assembly work in drywall construction (e.g. joining substructures).

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Product technical specifications
Precise technical specifications ensure that you choose the right product for your specific project:

Product code (SKU): WXXP13
Screw dimension: 4.2 x 13 mm
Screw type: Washer screw WSPC, self-drilling
Slot (socket) type: PH2 (Phillips)
Drilling capacity: Up to 2 mm thick
Washer head diameter: ø 11.5 mm
Pad thickness (head): 2 mm
Material: Galvanized carbon steel
Suitable substrate: Steel sheet, metal, wood, plastic
Quantity in package: 100 pieces

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Why choose this screw set?
When working with metal and sheet metal, it is crucial to use fasteners that do not loosen under load. These self-tapping screws with the correct thread pitch ensure an optimal connection of elements that will last for many years. The galvanized carbon steel prevents rusting, which means that the screws are suitable for both indoor and outdoor use. With the standard PH2 slot, you will get the job done quickly, without the screw bit slipping.
The 100-piece pack is the ideal size - giving you enough supply to complete larger projects or simply replenishing your home workshop supply so that screws are always on hand when you need them most.
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Frequently Asked Questions (FAQ)
1. Is it necessary to pre-drill a hole to use these screws?
No, pre-drilling is not required. The screws are self-drilling (self-tapping) and have a special tip that self-drills steel sheets up to 2 mm thick, which significantly speeds up and simplifies the installation process.
2. What bit do I need for these screws?
To tighten these screws, you need a standard cross-head or PH2 (Phillips 2) socket, which provides excellent grip and prevents slipping while tightening.
3. Are these screws suitable for outdoor use?
Yes, the screws are made of high-quality galvanized carbon steel. The zinc coating provides effective protection against corrosion, rust and weathering, making them suitable for both indoor and outdoor installation work.


Responsible persons:
PROTECHNIK - iRMA Tomasz Matoga Spółka Komandytowa, ul. Królewska 69, 32-447 Siepraw, Poland, biuro@irma.pl (+48) 122728810
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Before starting installation, check that you have the correct size of self-tapping screws for your project.
• Prepare the surface to which you will attach the screws. Ensure that the surface is clean, dry and free of obstructions.
• Select the appropriate drilling tool, such as a screwdriver or drill, and attach the appropriate drill bit.
• Place the self-tapping screw at the selected location on the surface and press it with appropriate force.
• Turn on the drill and start drilling into the material. Use even pressure and gently guide the drill so that the screw rotates properly and is inserted into the material.
• Continue drilling until the screw is fully driven into the material. Be careful not to overtighten the screw to avoid damaging the surface.
• If necessary, repeat the process for the remaining self-tapping screws.
• After completing the assembly, check that all screws are firmly fastened and that there are no loose screws.
• Adjust the pressure or drilling depth as necessary for optimal results.

Useful tips for work:
• Before assembly, check that you have enough self-tapping screws for your project. It is better to have a few spare screws than to be without them during the work.
• When drilling, use appropriate speed and pressure to ensure that the screw rotates properly and does not damage the material.
• If the screw gets stuck or does not go smoothly into the material, check that the drill bit is suitable and that the screw is the correct size.
• When installing multiple self-tapping screws, use a guide or mark the drilling locations to ensure even spacing of the screws.
• After completing the assembly, check that all screws are securely fastened. Tighten them if necessary.
• Store self-tapping screws in a dry place, away from moisture, to prevent rusting or damage.
• Always follow safety precautions when working with tools, including the use of protective equipment such as goggles and gloves.

Warnings:
• Use safety glasses and gloves.
• Do not use damaged screws.
• Be careful of sharp edges of the sheet metal.

Same summary

4.2x13 flat head self-tapping screws are best suited for projects where a strong, yet removable, connection is key – e.g. when fastening wooden panels, lightweight structures or thinner materials. Due to their shorter length, they are particularly suitable for thinner substrates or components where very deep screwing is not required. Their utility is most pronounced indoors or in places where there is no direct exposure to weather.

Recommendation source: Enaa guides and team experiences.

User view

These screws are often useful for DIYers when quickly assembling components, repairing small furniture, or attaching accessories to wooden, plastic, or thin metal surfaces. They are valued because they are easy to use with a regular screwdriver, and the result is a strong, yet removable joint—making it easier to renovate or repair later.

Many users also trust the Protechnik brand's offerings, as it is considered a reliable choice for both regular and occasional projects at home or in the garden.

Why buy at Enaa

At ENAA you can choose from a wide range of different types of screws, making it easy to compare and choose the most suitable product for your project. Additionally, you can use simple filters to help you plan by criteria such as dimensions, head type and packaging, so you can always quickly find exactly what you need.

Answers to frequently asked questions

For which materials are these self-tapping screws best suited?

4.2x13 flat head screws are particularly suitable for wooden, plastic or thin metal materials where strength and a clean surface after assembly are required.

Is special hole preparation required for use?

Since these are self-tapping screws, special hole preparation is generally not necessary for softer materials; however, for harder substrates, it is recommended to first mark or slightly pre-drill the screw location.

Are these screws also suitable for outdoor use?

For permanent outdoor use, it is recommended to check whether the screws have adequate anti-corrosion protection, as standard screws without protection are not optimal for long-term exposure to moisture and weather.

What tools do I need to install these screws?

To install these flat self-tapping screws, we recommend using the appropriate bit on a screwdriver or screwdriver that matches the type of screw head.

How many screws do I need for a small project like assembling a shelf?

For smaller projects, such as assembling a simple shelf or frame, one pack of 100 screws is usually sufficient, but the exact quantity depends on the design and dimensions of the structure.

Description updated: April 2026