{"product_id":"countersunk-window-screws-with-slash-point-zinc-yellow","title":"Countersunk Phillips Window Screws With Slash Point Zinc \u0026 Yellow (Box of 1000)","description":"\u003cp\u003eTired 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.\u003c\/p\u003e\n\u003ch3\u003eAdvanced Hi-Lo Thread Engineering\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eStandard 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.\u003c\/p\u003e\n\u003ch3\u003eSelf-Cleaving Slash Point\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eDriving 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.\u003c\/p\u003e\n\u003ch3\u003eFlush Countersunk Phillips Head\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eProtruding 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.\u003c\/p\u003e\n\u003ch3\u003eBS 7412 Structural Compliance\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eInstalling 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.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered specifically for unreinforced single and multi-chamber UPVC sections.\u003c\/li\u003e\n\u003cli\u003eHi-Lo thread geometry provides maximum pull-out strength in plastic.\u003c\/li\u003e\n\u003cli\u003eSlash point (cut tip) reduces insertion torque and prevents profile splitting.\u003c\/li\u003e\n\u003cli\u003eCountersunk head with Phillips drive ensures a flush, snag-free finish.\u003c\/li\u003e\n\u003cli\u003eZinc \u0026amp; Yellow Plated (YZP) finish for enhanced corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eFully compliant with British Standard BS 7412 for plastic window assemblies.\u003c\/li\u003e\n\u003cli\u003eSupplied in economical, production-ready trade boxes of 1000.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ASP","offers":[{"title":"3.9 x 32mm","offer_id":55499685888376,"sku":"CHS3932Y","price":15.06,"currency_code":"GBP","in_stock":true},{"title":"3.9 x 38mm","offer_id":55499685921144,"sku":"CHS3938Y","price":38.21,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0802\/8658\/1049\/files\/CHS3932Y.jpg?v=1787916782","url":"https:\/\/www.electrosw.co.uk\/products\/countersunk-window-screws-with-slash-point-zinc-yellow","provider":"Electro South West Ltd","version":"1.0","type":"link"}