Timco Faceted Countersunk Self-Drilling Window Screws Zinc (Pack of 100)

Struggling with slow assembly times or driver bit slippage when pinning steel reinforcement into PVCu window profiles? Attaching internal metal stiffeners requires a fastener that can pierce steel cleanly without stripping or jamming in high-speed machinery. These M4 x 19mm Countersunk Facet Self-Drilling Screws are specifically built for the job. Engineered with a precision self-drilling point and full metric thread, they bore through steel inserts instantly, while the faceted countersunk head sits completely flush for seamless, efficient window fabrication.

Auto-Feed Machine Compatibility

Manual feeding during high-volume window production creates bottlenecks and increases labor costs. These M4 x 19mm screws are specifically manufactured with tight tolerances for optimal performance in automated auto-feed screwing machinery. Their consistent head geometry and drive recess ensure jam-free feeding, maximizing throughput on fast-paced PVCu manufacturing lines.

High-Speed Self-Drilling Point

Pre-drilling steel reinforcement inside PVCu profiles is time-consuming and wears down drill bits rapidly. The precision self-drilling point drills through the PVCu chamber wall and internal steel core in a single fluid operation. This eliminates pre-drilling entirely, saving valuable assembly time while creating a tight, vibration-proof metric thread inside the steel insert.

Faceted Countersunk Head for Flush Seating

Protruding screw heads inside frame chambers can prevent window sashes from closing properly or snag internal locking hardware. The faceted countersunk head reams away excess plastic profile material as it seats. This gives you the practical advantage of drawing the screw head completely flush against the PVCu wall for a neat, obstruction-free finish every time.

Reliable Zinc-Plated Carbon Steel

Inferior fasteners can strip their threads or snap under high torque when driving into tough steel reinforcement. Manufactured from high-tensile carbon steel with a protective Zinc finish (Corrosion Rating 2), these screws offer the structural strength needed to withstand high-speed driving into steel reinforcement without shearing or stripping.

Key Features

• Specifically designed for pinning steel reinforcement inside PVCu frames.
• Precision self-drilling point eliminates the need for pilot holes in steel.
• Metric M4 x 19mm fully-threaded shaft maximizes clamping and pull-out resistance.
• Faceted countersunk head ensures smooth, flush seating in plastic profiles.
• Standard PH2 Phillips drive recess minimizes driver bit cam-out.
• High-tensile carbon steel construction with a protective Zinc finish.
• Corrosion Rating 2 (suitable for occasionally damp, rural, and sheltered environments).