{"product_id":"timber-to-metal-screw-sbs-a2","title":"SBS A2 | AISI304 · Self-drilling timber-to-metal screw","description":"\u003cp\u003eSBS A2 fixes timber straight onto a steel or aluminium substructure. The tip drills the metal as the screw goes in, so there is no pilot hole to make first.\u003c\/p\u003e\n\n\u003cp\u003eIt is a bimetal screw. The head and body are A2 | AISI304 stainless steel, for corrosion resistance. The tip is carbon steel, because carbon steel drills better. The bleeder tip cuts through steel and aluminium, and fins on the shank protect the thread while it passes through the timber. Sharp ribs under the head leave a clean finish on the wood.\u003c\/p\u003e\n\n\u003cp\u003eIt is suitable for outdoor use in service classes 1 to 3. The atmospheric and wood corrosivity classes it is rated for are in the Specifications tab.\u003c\/p\u003e\n\n\u003ch2\u003eWhere it's used\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eTimber fixed to S235 steel substructures\u003c\/li\u003e\n  \u003cli\u003eTimber fixed to aluminium substructures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat it drills through\u003c\/h2\u003e\n\u003cp\u003eHow thick a plate it drills depends on the diameter. The 4.8 mm screw drills S235 steel from 1 to 3 mm and aluminium from 2 to 3 mm. The 5.5 mm screw drills steel from 2 to 5 mm and aluminium from 3 to 5 mm. The 6.3 mm screws drill steel from 3 to 6 mm and aluminium from 4 to 8 mm. Each range has a bottom as well as a top, so check your plate against the code before you order.\u003c\/p\u003e\n\n\u003ch2\u003eSizes\u003c\/h2\u003e\n\u003cp\u003eThree diameters, four codes. 4.8 × 45 mm and 5.5 × 55 mm take a TX25 drive. 6.3 × 70 mm and 6.3 × 120 mm take TX30. The bit is included.\u003c\/p\u003e\n\n\u003cp\u003eBox quantity is not the same across the range. The 4.8 and 5.5 mm screws come 200 to a box, the 6.3 mm screws 100 to a box. Read the pack quantity from the row rather than assuming one figure.\u003c\/p\u003e\n\n\u003ch2\u003eBefore you fix\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eNo pre-drilled hole is needed\u003c\/li\u003e\n  \u003cli\u003eSet the drill speed to the metal: about 1,000 to 1,500 rpm into steel, about 600 to 1,000 rpm into aluminium\u003c\/li\u003e\n  \u003cli\u003eThe steel figures on the datasheet are for S235 steel\u003c\/li\u003e\n  \u003cli\u003eCheck your plate is inside the range for your code, not only under the maximum\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCodes, geometry and the full figures for each code are in the Specifications tab and the linked datasheet. See the full \u003ca href=\"\/collections\/screws-for-timber\"\u003etimber screw range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePrice shown is per box. The box holds 200 or 100 depending on the code, so check the pack quantity on the row.\u003c\/em\u003e\u003c\/p\u003e","brand":"Rothoblaas","offers":[{"title":"4.8 mm \/ 45 mm","offer_id":55291587002710,"sku":"SBSA24845","price":49.28,"currency_code":"GBP","in_stock":true},{"title":"5.5 mm \/ 55 mm","offer_id":55291587035478,"sku":"SBSA25555","price":64.64,"currency_code":"GBP","in_stock":true},{"title":"6.3 mm \/ 70 mm","offer_id":55291587068246,"sku":"SBSA26370","price":44.96,"currency_code":"GBP","in_stock":true},{"title":"6.3 mm \/ 120 mm","offer_id":55291587101014,"sku":"SBSA263120","price":75.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1025\/7383\/4582\/files\/SBS-A2-1750256694-image-1080x1080-crop.png?v=1789042961","url":"https:\/\/timbasystems.com\/products\/timber-to-metal-screw-sbs-a2","provider":"TimbA Systems","version":"1.0","type":"link"}