{"title":"Concrete screw","description":"\u003cp\u003e\u003cstrong\u003eStainless steel concrete screw\u003c\/strong\u003e is a self-tapping screw that is driven directly into a pre-drilled hole in concrete or masonry, without a separate expansion sleeve or plug.\u003c\/p\u003e\u003cp\u003eAvailable with various head and drive types to suit assembly and access requirements. Suitable for industrial, construction, and marine environments.\u003c\/p\u003e","products":[{"product_id":"betongskruv-a4","title":"Concrete screw | TXE | A4","description":"\u003cp class=\"\"\u003eIf you need a \u003cstrong\u003econcrete screw\u003c\/strong\u003e for installation without anchors in damp or corrosive environments, the A4 TXE stainless steel concrete screw is an optimal choice. The screw is manufactured from acid-proof A4 \/ AISI 316 steel and is specifically designed for aggressive environments such as coastal installations, industrial premises, or wet areas. It features a heavy-duty hexagonal head with an integrated flange for even contact and a cutting thread that provides direct fastening in pre-drilled holes – completely without an anchor. The product is sold individually.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003eFIELD OF APPLICATION\u003c\/h2\u003e\n\u003cp class=\"\"\u003eConcrete screw A4 TXE is used for anchoring brackets, railings, machine mounts, and signs in concrete. It is ideal for seaside construction, chemical environments, and other corrosive settings where traditional fasteners rust quickly. The screw provides a strong, vibration-resistant, and permanent anchorage – without expansion. Installed with a hex socket and requires pre-drilling. Suitable for both cracked and non-cracked concrete.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\n\u003cp class=\"\"\u003e• Product type: Concrete screw\u003cbr\u003e• Standard: Not specified\u003cbr\u003e• Grade: A4 \/ AISI 316 (acid-proof stainless steel)\u003cbr\u003e• Material class: A4-80\u003cbr\u003e• Thread type: Cutting thread for concrete\u003cbr\u003e• Surface treatment: Untreated (natural stainless steel)\u003cbr\u003e• Head shape: Hexagon with flange\u003cbr\u003e• Drive type: External hex (SW)\u003c\/p\u003e\n\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eHow does a concrete screw work without an anchor, and what is the benefit of a cutting thread?\u003c\/h3\u003e\n\u003cp\u003eA concrete screw (also called a concrete bolt) threads itself directly into the pre-drilled hole in the concrete:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMechanical anchoring:\u003c\/b\u003e The screw's hardened thread tips cut a groove into the concrete wall during installation. This creates a rigid, form-locked connection without the need for expansion sleeves or plastic anchors.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eExpansion-free fastening:\u003c\/b\u003e Unlike classic expansion bolts, concrete screws do not create outward tension\/expansion force in the concrete. This allows for installation close to edges and with shorter spacing between fasteners without the risk of cracking.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eDirect installation:\u003c\/b\u003e You pre-drill directly through the component and drive in the screw — which saves significant time during serial installation of studs, brackets, and steel structures.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhy is A4 \/ AISI 316 critical for concrete screws outdoors and in aggressive environments?\u003c\/h3\u003e\n\u003cp\u003eStandard concrete screws in electro-galvanized or hardened carbon steel rust quickly outdoors or in damp drill holes where condensation collects.\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eComplete corrosion protection:\u003c\/b\u003e Acid-proof A4 steel (1.4401 \/ AISI 316) is alloyed with molybdenum and effectively prevents crevice and pitting corrosion from road salt, sea air, chlorine, and industrial chemicals.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eCoastal \u0026amp; Wet Areas:\u003c\/b\u003e Perfect choice for installation in piers, facades, car washes, treatment plants, swimming pools, and chemical industries.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSpecially hardened thread tip:\u003c\/b\u003e The screw is manufactured using advanced dual-metal\/hardening technology where the screw's cutting tip has sufficient hardness to cut into concrete, while the screw body retains the tough corrosion resistance of A4 steel.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhat does the \"Hexagon with flange and TX\/TXE\" head shape mean for installation?\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eWasher-free contact:\u003c\/b\u003e The integrated flange under the hexagonal head distributes clamping force over a larger surface area. This eliminates the need for separate washers and provides a neat, stable installation against both steel and wood.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eDual drive system (TX \/ Hexagon):\u003c\/b\u003e Can be driven with standard sockets or open-end wrenches via the hex head, or alternatively with TX bits (Torx) for optimal power transmission when installing in tight spaces where a socket will not fit.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhat should one consider regarding drill diameter and drill depth during installation?\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eDrill diameter:\u003c\/b\u003e Drill the hole with the exact recommended drill diameter (e.g., \u003cspan class=\"math-inline\"\u003e$6\\text{ mm}$\u003c\/span\u003e bit for a \u003cspan class=\"math-inline\"\u003e$7.5\\text{ mm}$\u003c\/span\u003e concrete screw) using an approved SDS-plus concrete drill bit.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eCleaning the drill hole:\u003c\/b\u003e \u003cb\u003eCritical step!\u003c\/b\u003e Blow out and brush the hole clean of concrete dust. If dust is left behind, the screw may bind prematurely before reaching the correct setting depth.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eExtra drill depth:\u003c\/b\u003e Always drill the hole approx. \u003cspan class=\"math-inline\"\u003e$10\\text{--}15\\text{ mm}$\u003c\/span\u003e deeper than the intended setting depth to provide space for the dust created when the thread cuts into the concrete.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Index","offers":[{"title":"6 \/ 40","offer_id":50211058123094,"sku":"101577","price":25.0,"currency_code":"SEK","in_stock":false},{"title":"6 \/ 60","offer_id":50211058155862,"sku":"101578","price":29.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 70","offer_id":50211058385238,"sku":"101579","price":39.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 80","offer_id":50211058418006,"sku":"101580","price":45.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 90","offer_id":50211058450774,"sku":"101581","price":49.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 105","offer_id":50211058516310,"sku":"101582","price":55.0,"currency_code":"SEK","in_stock":true},{"title":"10 \/ 70","offer_id":50211058680150,"sku":"101583","price":49.0,"currency_code":"SEK","in_stock":true},{"title":"10 \/ 90","offer_id":50211058745686,"sku":"101584","price":59.0,"currency_code":"SEK","in_stock":true},{"title":"10 \/ 100","offer_id":50211058778454,"sku":"101585","price":65.0,"currency_code":"SEK","in_stock":true},{"title":"10 \/ 120","offer_id":50211058876758,"sku":"101586","price":69.0,"currency_code":"SEK","in_stock":true},{"title":"12 \/ 80","offer_id":50211059007830,"sku":"","price":69.0,"currency_code":"SEK","in_stock":false},{"title":"12 \/ 110","offer_id":50211059138902,"sku":"101588","price":95.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/files\/rostfri-nu-a4-stainless-concrete-screw_a827bfbb-18d6-4a4c-b77c-7fb69c122ea1.jpg?v=1786537430"},{"product_id":"betongskruv-kullrig-a4","title":"Concrete screw | TXP | A4","description":"\u003cp\u003eIf you need a \u003cstrong\u003econcrete screw for installation without plugs\u003c\/strong\u003e in damp, salty, or chemically demanding environments, the \u003cstrong\u003eA4 TXP Stainless Steel Concrete Screw\u003c\/strong\u003e is an excellent choice.\u003cbr\u003eThe screw is manufactured from \u003cstrong\u003eacid-proof A4 \/ AISI 316 steel\u003c\/strong\u003e and developed for secure fastening in \u003cstrong\u003eaggressive environments\u003c\/strong\u003e such as coastal structures, industrial facilities, or wet rooms.\u003cbr\u003eIt features a \u003cstrong\u003epan head with a TX (Torx) recess\u003c\/strong\u003e, providing optimal grip during installation and a neat, flush finish against the substrate. The \u003cstrong\u003ecutting thread\u003c\/strong\u003e enables direct fastening into a pre-drilled hole – without the need for a plug – allowing for fast and efficient installation. The product is sold individually.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003eAPPLICATION AREAS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eA4 TXP Concrete Screw\u003c\/strong\u003e is used for anchoring \u003cstrong\u003erailings, fittings, brackets, ventilation components, signs, and machine parts\u003c\/strong\u003e in concrete.\u003cbr\u003eIt is particularly suitable for \u003cstrong\u003emarine environments, chemically exposed premises, food production, and wet rooms\u003c\/strong\u003e where high corrosion resistance is required.\u003cbr\u003eThe screw provides a \u003cstrong\u003estrong, vibration-resistant, and non-expanding anchor\u003c\/strong\u003e that does not stress the concrete in the same way as expansion anchors.\u003cbr\u003eEasily installed with a \u003cstrong\u003eTX bit\u003c\/strong\u003e and requires pre-drilling. Suitable for both \u003cstrong\u003ecracked and non-cracked concrete\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct type: \u003c\/strong\u003eConcrete screw\u003cbr\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e Not specified\u003cbr\u003e\u003cstrong\u003eQuality: \u003c\/strong\u003eA4 \/ AISI 316 (acid-proof stainless steel)\u003cbr\u003e\u003cstrong\u003eMaterial class: \u003c\/strong\u003eA4-80\u003cbr\u003e\u003cstrong\u003eThread type: \u003c\/strong\u003eCutting thread for concrete\u003cbr\u003e\u003cstrong\u003eSurface treatment: \u003c\/strong\u003eUntreated (natural-colored stainless steel)\u003cbr\u003e\u003cstrong\u003eHead shape: \u003c\/strong\u003ePan head with TX recess\u003cbr\u003e\u003cstrong\u003eDrive type: \u003c\/strong\u003eInternal TX (Torx)\u003c\/p\u003e\n\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eHow does direct fastening with a concrete screw without a plug work?\u003c\/h3\u003e\n\u003cp\u003eThe concrete screw is equipped with a specially designed, hardened thread that cuts its own threads directly into the pre-drilled hole in concrete, brick, or hollow blocks. This eliminates the need for plastic plugs, which significantly shortens installation time, provides immediate load-bearing capacity, and allows for installation near edges since the screw does not create the same expansive bursting force in the substrate as traditional expansion bolts.\u003c\/p\u003e\n\u003ch3\u003eWhy is acid-proof A4 \/ AISI 316 the right material choice for outdoor concrete screws?\u003c\/h3\u003e\n\u003cp\u003eAcid-proof A4 steel (AISI 316 \/ 1.4401) contains molybdenum, which provides maximum corrosion protection against chlorides, saltwater, road salt, and aggressive industrial chemicals. This makes the screw ideal for permanent and secure fastening in coastal facades, tunnels, car washes, the food industry, and other highly corrosive outdoor environments where standard galvanized or A2 screws risk corrosion over time.\u003c\/p\u003e\n\u003ch3\u003eWhat advantages does the TXP pan head provide for installation and finish?\u003c\/h3\u003e\n\u003cp\u003eThe pan head (TXP) distributes the clamping force evenly over the component being mounted and provides a neat, smooth, and flush finish against the surface without protruding edges. The integrated TX recess (Torx) ensures maximum torque transfer from the screwdriver, reducing the risk of the bit slipping and damaging the recess under the high torque load that occurs when the thread cuts into the concrete.\u003c\/p\u003e","brand":"Index","offers":[{"title":"6 \/ 50","offer_id":51518200152406,"sku":"102262","price":29.0,"currency_code":"SEK","in_stock":true},{"title":"6 \/ 60","offer_id":51518200185174,"sku":"102263","price":39.0,"currency_code":"SEK","in_stock":true},{"title":"6 \/ 80","offer_id":51518200217942,"sku":"102264","price":45.0,"currency_code":"SEK","in_stock":true},{"title":"6 \/ 100","offer_id":51518200250710,"sku":"102265","price":49.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 60","offer_id":51518200283478,"sku":"102266","price":38.0,"currency_code":"SEK","in_stock":true},{"title":"8 \/ 80","offer_id":51518200316246,"sku":"102267","price":49.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/files\/rostfri-nu-a4-stainless-concrete-screw.jpg?v=1786535885"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/collections\/rostfri-nu-a4-stainless-concrete-screw.jpg?v=1790152808","url":"https:\/\/rostfri.nu\/en\/collections\/betongskruv.oembed","provider":"Rostfri.nu","version":"1.0","type":"link"}