{"product_id":"multi-fix-countersunk-concrete-screws-7-5-x-100mm-100-box","title":"Multi-Fix Countersunk Concrete Screws 7.5 x 100mm (100\/Box)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003e7.5 × 100mm Multi-Fix Countersunk Concrete Screws for direct installation into solid concrete, brick, block, or masonry substrates without the use of a plug.\u003cbr\u003e\u003cbr\u003eManufactured from case-hardened carbon steel with a durable zinc-plated finish, they provide rapid installation, high pull-out resistance, and dependable torque control.\u003cbr\u003e\u003cbr\u003eThe countersunk head produces a neat, flush finish ideal for visible or surface-mounted fittings, while the serrated single-thread design ensures fast cutting action and secure anchorage even in dense substrates.\u003cbr\u003e\u003cbr\u003e7.5 × 100mm sizing is suited to fixing heavy frames, lintels, and roof plates to solid masonry.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial composition\u003c\/strong\u003e: Case-hardened carbon steel delivers superior torsional strength and thread retention under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive type\u003c\/strong\u003e: Pozi recess ensures precise torque transfer and reduced cam-out under sustained drive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead design\u003c\/strong\u003e: Countersunk form provides a flush, professional finish against timber or metal components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread form\u003c\/strong\u003e: Serrated single-thread profile enables rapid cutting and high mechanical interlock in masonry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion resistance\u003c\/strong\u003e: Zinc-plated coating to ISO 2081 provides reliable protection in dry interior environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal size\u003c\/strong\u003e: 7.5 × 100mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox quantity\u003c\/strong\u003e: Supplied in a box of 100 for consistent trade supply and efficient multi-project use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy frames:\u003c\/strong\u003e Secure fixing for door and window frames to masonry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLintels:\u003c\/strong\u003e Reliable anchorage for structural steel or timber lintels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof plates:\u003c\/strong\u003e Strong connection between timber and brick substrates.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot holes\u003c\/strong\u003e: Drill 6mm pilot holes using an SDS or masonry bit to a minimum of 10mm beyond embedment depth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive selection\u003c\/strong\u003e: Use a Pozi No.3 bit for controlled torque application and stable recess engagement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsertion method\u003c\/strong\u003e: Drive at moderate speed without hammer action to maintain thread integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinishing\u003c\/strong\u003e: Tighten until the head seats flush; avoid overtightening to prevent substrate cracking.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacture standard\u003c\/strong\u003e: Produced to EN 14592 for mechanical fasteners and tested in accordance with ETA performance protocols.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical strength\u003c\/strong\u003e: Case-hardened for enhanced torsional capacity and consistent pull-out performance in solid materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish\u003c\/strong\u003e: Zinc electroplated to ISO 2081 for internal corrosion protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety guidance\u003c\/strong\u003e: Always wear eye and hearing protection when drilling or fixing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Suitable only for non-cracked, sound masonry and concrete. Not designed for friable substrates or load-bearing structural anchorage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"100mm","offer_id":53771568840815,"sku":"1001068","price":21.06,"currency_code":"GBP","in_stock":false},{"title":"110mm","offer_id":53771568873583,"sku":"1001069","price":25.7,"currency_code":"GBP","in_stock":false},{"title":"120mm","offer_id":53771568906351,"sku":"1001070","price":27.52,"currency_code":"GBP","in_stock":false},{"title":"130mm","offer_id":53771568939119,"sku":"1001071","price":33.05,"currency_code":"GBP","in_stock":false},{"title":"150mm","offer_id":53771568971887,"sku":"1001072","price":39.0,"currency_code":"GBP","in_stock":false},{"title":"180mm","offer_id":53771569004655,"sku":"1001073","price":60.78,"currency_code":"GBP","in_stock":false},{"title":"200mm","offer_id":53771569037423,"sku":"1001074","price":79.18,"currency_code":"GBP","in_stock":false},{"title":"40mm","offer_id":53771569070191,"sku":"1001062","price":11.38,"currency_code":"GBP","in_stock":false},{"title":"50mm","offer_id":53771569102959,"sku":"1001063","price":12.64,"currency_code":"GBP","in_stock":false},{"title":"60mm","offer_id":53771569135727,"sku":"1001064","price":14.59,"currency_code":"GBP","in_stock":false},{"title":"70mm","offer_id":53771569168495,"sku":"1001065","price":16.6,"currency_code":"GBP","in_stock":false},{"title":"80mm","offer_id":53771569201263,"sku":"1001066","price":19.09,"currency_code":"GBP","in_stock":false},{"title":"90mm","offer_id":53771569234031,"sku":"1001067","price":19.72,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Multi-Fix_Countersunk_Concrete_Screws_-_Photo.jpg?v=1783758840","url":"https:\/\/supplyyard.co.uk\/products\/multi-fix-countersunk-concrete-screws-7-5-x-100mm-100-box","provider":"Supply Yard","version":"1.0","type":"link"}