CORROSHIELD® Fasteners PROTAPP® Nylon Head Screw
CORROSHIELD® Fasteners PROTAPP® is engineered for projects where the fastener head is exposed to weather and aggressive outdoor conditions. The nylon head system is designed to improve long-term appearance and protection, while the EPDM sealing system supports leak resistance on roofing and cladding applications.
Specification
Material: Carbon Steel
Head Type: Double Hex Flange, Nylon head
Thread: Double Thread, ScratchShield®
Drill Point: LEVIN® Drill Point
Drilling Capacity: Max 5.5mm steel
Best-Fit Applications
PROTAPP® is recommended for:
Harsh environment construction where long-term exposure is expected
Roofing and cladding applications requiring weather sealing
Projects where colour-matched screw heads are required for aesthetics
Installations needing strong seating and reduced washer damage risk
Key Features & Benefits
/1
No-rust head + weather-proof capabilities
The nylon head delivers non-metallic head protection and supports long-term appearance in exposed conditions.
/2
Colour matched to RAL codes
Available as colour matched to any RAL colour codes—helping the fastener blend with pre-painted profiles and façade colours.
/3
Leakproof sealing (EPDM) with non-metallic interface
Designed with leakproof EPDM sealing and non-metallic material at the head interface to support weather-tight fastening.
/4
Cavity under flange to prevent washer shearing
A cavity under the flange helps reduce the risk of washer shearing during installation—supporting consistent sealing.
/5
Precision + torque handling
Brochure callouts include:
- Precision accuracy for fastener centricity
- High hardness to handle driving torque
- Precision accuracy for fastener centricity
- High hardness to handle driving torque
Why PROTAPP® for
& exposed head fixings?
If your project needs a screw head that stays clean-looking and protected, PROTAPP® combines:
No rust head benefit (nylon head)
Colour matching for architectural finish
Sealing-focused underhead design
ScratchShield® shank protection and LEVIN® drilling performance
How to Select the Right PROTAPP® Screw?
Define the application – Choose the PROTAPP® screw based on whether it’s used for drywall, boards, or light-gauge framing applications.
Check substrate compatibility – Select the correct screw type according to the base material such as steel or timber supports.
Select appropriate thread & point – Ensure the thread design and drill point allow fast, secure fixing without damaging the board.
Consider finish & corrosion resistance – Opt for suitable coatings to match indoor or semi-exposed environments for long-term performance.
Installation guidelines (quick best practices)
Use the correct driver for AF 8mm to maintain clean seating on the nylon head.
Drive until the assembly is secure—do not overdrive, to protect sealing performance.
Ensure the surface is clean and the screw is driven straight for best washer seating.
Get Pricing & availability for PROTAPP®
Frequently asked questions
It refers to the nylon head design intended to provide non-metallic head protection and improved durability/appearance in exposed applications.
Yes. The brochure specifies colour matched to any RAL colour codes.
Yes. It uses a LEVIN® drill point with a maximum 5.5mm steel drilling capacity (catalogue spec).
Yes—PROTAPP® highlights leakproof EPDM sealing and a design intended to reduce washer shearing.
