Countersunk Phillips Window Screws With Slash Point Zinc & Yellow (Box of 1000)

Tired of plastic profiles splitting or window hardware pulling loose over time? Mounting friction stays, handles, and locking keeps directly to unreinforced UPVC requires a fastener built specifically for vinyl substrates. Standard wood or sheet metal screws can easily burst thin chamber walls or strip out under load. These Countersunk Phillips Window Screws solve the problem with an advanced Hi-Lo thread profile and a self-cleaving slash point. They cut cleanly into plastic without creating excessive expansion stress, ensuring a permanent, vibration-resistant anchor every time.

Advanced Hi-Lo Thread Engineering

Standard single-thread screws cut narrow grooves in plastic that can strip out under light torque. The Hi-Lo double-thread design combines high and low thread crests. This gives you the practical advantage of driving deeper into the unreinforced plastic, displacing less material while vastly increasing resistance to strip-out and pull-out forces.

Self-Cleaving Slash Point

Driving standard pointed screws into unreinforced multi-chamber profiles creates severe radial pressure that cracks internal web walls. The integrated slash point (cut tip) acts as a miniature drill bit, slicing through the plastic wall as it enters. This relieves stress on the profile, eliminating pre-drilling and preventing chamber wall bursting.

Flush Countersunk Phillips Head

Protruding screw heads can interfere with window seals, slide mechanisms, and flush-fitting hardware. The flat countersunk head sits completely flush within standard window hardware countersinks. Paired with a deep Phillips recess, it allows for smooth, wobble-free driving using automated production lines or handheld power tools.

BS 7412 Structural Compliance

Installing non-compliant fixings in window manufacturing can compromise the entire unit's rating and fail quality inspections. Manufactured in strict accordance with BS 7412 standards, these window screws are specifically certified for plastic window and door fabrications, ensuring your installations meet strict building and trade quality requirements.

Key Features

• Engineered specifically for unreinforced single and multi-chamber UPVC sections.
• Hi-Lo thread geometry provides maximum pull-out strength in plastic.
• Slash point (cut tip) reduces insertion torque and prevents profile splitting.
• Countersunk head with Phillips drive ensures a flush, snag-free finish.
• Zinc & Yellow Plated (YZP) finish for enhanced corrosion resistance.
• Fully compliant with British Standard BS 7412 for plastic window assemblies.
• Supplied in economical, production-ready trade boxes of 1000.