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ULTIMATE FLUSH-MOUNT SECURITY – Engineered with a 6-Lobe Star Drive with a central pin (Tamper-Resistant Torx), impossible to remove with standard tools. The countersunk design allows the screw to sit flush with the surface, making it perfect for securing door hinges, strike plates, floor trims, and public fixtures where a protruding head would be a hazard.
MARINE GRADE 304 STAINLESS STEEL – Crafted from 100% solid 18-8 (304) Stainless Steel, offering superior corrosion and rust resistance. Ideal for humid bathrooms, outdoor gates, and marine environments, ensuring your installations remain secure and rust-free even in harsh weather.
DIN7991 STYLE COUNTERSUNK HEAD – Features a standard 90-degree cone shape designed to self-center in pre-drilled countersunk holes. This ensures a sleek, smooth finish that prevents snagging on clothing or equipment, critical for high-traffic areas, flooring, and walkways.
VERSATILE SELF-TAPPING PERFORMANCE – Sharp threads grip securely into wood, plastic, and thin metal. (Expert Tip: For lengths like 20mm or into hard materials, pre-drilling a pilot hole is REQUIRED to prevent the security pin from shearing. Please DO NOT use High-Torque Impact Drivers; hand tightening or a clutch drill is recommended to avoid stripping the head.)
IMPORTANT: SIZE & MEASUREMENT GUIDE – This pack contains 50 Pcs of M5 x 35mm Flat Head Security Screws. NOTE: Unlike round head screws, Flat Head length is measured from the TOP of the head to the TIP of the point (Total Length = 35mm). Includes a 50mm Long T25 Security Bit for easy deep-hole access.

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Upgrade Your Security with a Sleek, Flush Finish

When security matters but aesthetics are equally important, standard protruding screws just won't cut it. Our Flat Head (Countersunk) Security Torx Screws are designed to sit perfectly flush with the surface, offering a tamper-proof solution for door hardware, floor plates, and high-traffic areas.

Why Choose Our Flat Head Security Screws?
True Flush Mounting: The DIN7991-style head (90-degree cone) allows the screw to sink into the material or hardware, creating a smooth surface that won't snag shoes, clothes, or equipment.
Tamper-Proof Design: The Star Drive with a central pin ensures that thieves cannot remove your fixtures with regular screwdrivers.
Marine Grade Durability: Made from solid 304 Stainless Steel, these screws are built to resist rust in outdoor and humid environments.

CRITICAL MEASUREMENT NOTE (Please Read):
Standard screws are measured from under the head. However, Flat Head (Countersunk) screws are measured from the TOP of the head to the TIP of the screw.
Example: An M4 x 20mm Flat Head screw has a total overall length of 20mm.

Expert Installation Tips:
1. Pre-Drill: For 20mm length or longer, always drill a pilot hole to prevent the screw from snapping.
2. No Impact Drivers: Use a standard drill/driver or hand tool. High-torque impact drivers may damage the security pin.
3. Countersink: Ensure your material has a countersunk hole (V-shape) so the head can sit flush.

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