{"product_id":"securfix-performance-screw-3-5-x-20mm-box-of-200","title":"Securfix Performance Screw 3.5 x 20mm - Box of 200","description":"\u003cp\u003e3.5 x 20mm performance screws from Securfix come 200 to a box, designed to start quickly and drive without a pilot hole. An anti-friction thread prevents jacking, and the thread is partially serrated. Listed materials include chipboard, PVCu, hardwood, sheet metal, softwood, MDF and plasterboard.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSize 3.5 x 20mm, box of 200\u003c\/li\u003e\n\u003cli\u003eSelf-drilling and self-countersinking\u003c\/li\u003e\n\u003cli\u003eNo pilot hole needed\u003c\/li\u003e\n\u003cli\u003eAnti-friction thread prevents jacking\u003c\/li\u003e\n\u003cli\u003ePartially serrated thread\u003c\/li\u003e\n\u003cli\u003eDouble corrosion resistance\u003c\/li\u003e\n\u003cli\u003eSuits chipboard, PVCu, hardwood, sheet metal, softwood, MDF and plasterboard\u003c\/li\u003e\n\u003cli\u003ePZ bit included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSecurfix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e3.5 x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003ePZ bit included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich one do I need?\u003c\/h3\u003e\u003cp\u003eSize 3.5 x 20mm gives diameter first and length second. Compare the length with the combined thickness of your parts so the point does not break out of the back.\u003c\/p\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eMark the positions and check there are no pipes or cables behind.\u003c\/li\u003e\n\u003cli\u003eSkip the pilot hole, as the manufacturer says none is needed for a self-drilling screw.\u003c\/li\u003e\n\u003cli\u003eUse a PZ bit that fits the head and keep it square while you drive.\u003c\/li\u003e\n\u003cli\u003eLet the self-countersinking head finish flush with the surface, then stop.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003ch4\u003eWhat does the box of 3.5 x 20mm screws contain?\u003c\/h4\u003e\u003cp\u003eThe box holds 200, each 3.5 x 20mm.\u003c\/p\u003e\u003ch4\u003eDo I need a pilot hole for 3.5 x 20mm performance screws?\u003c\/h4\u003e\u003cp\u003eNo. The manufacturer says they are self-drilling and need no pilot hole.\u003c\/p\u003e\u003ch4\u003eWhat does the thread do?\u003c\/h4\u003e\u003cp\u003eThe anti-friction thread prevents jacking, and it is partially serrated.\u003c\/p\u003e","brand":"Securfix","offers":[{"title":"Default Title","offer_id":67824113385745,"sku":"DS-2229659","price":1.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/7323\/0097\/files\/securfix-performance-screw-3-5-x-20mm-box-of-200-1.png?v=1792511386","url":"https:\/\/diysmith.co.uk\/products\/securfix-performance-screw-3-5-x-20mm-box-of-200","provider":"DIYSmith","version":"1.0","type":"link"}