{"product_id":"m6-hex-head-coach-screws-zinc-plated","title":"DIYUK M6 (6mm) Hex Head Coach Screws DIN 571, Heavy Duty BZP Timber Fasteners and Lag Bolts, 40-120mm, 8 Lengths, Packs of 1-100","description":"\u003cp\u003e\u003cstrong\u003eM6 hexagon head coach screws manufactured to DIN 571\u003c\/strong\u003e. Also known as lag screws, lag bolts or hex head wood screws, these heavy-duty fasteners use a hexagon head rather than a slotted or recessed drive, so they can be tightened with a standard spanner or socket for far higher torque than a screwdriver allows – useful wherever a fixing needs to be pulled up firmly and, if necessary, checked or re-tightened later.\u003c\/p\u003e\n\u003cp\u003eThe screws are manufactured from steel and finished with a bright zinc-plated (BZP) coating, giving general-purpose corrosion resistance.\u003c\/p\u003e\n\u003cp\u003eThe coarse, deep wood-screw thread is designed to bite directly into timber, generating high pull-out resistance without needing a nut on the far side – making these screws well suited to structural and semi-structural timber connections, as well as general joinery and assembly work. Used with a suitable wall plug, they can also be driven into brick, block or concrete, giving one fastener that covers both timber-to-timber and timber-to-masonry fixing.\u003c\/p\u003e\n\u003cp\u003eEight lengths cover these 6mm coach screws, so you can choose coach screws M6 x 40mm through to M6 x 120mm to suit different timber thicknesses and joint depths: short coach screws at 40mm and 50mm, mid lengths at 60mm, 70mm, 80mm and 90mm, and long wood screws for thicker timber, including 100mm wood screws and a 120mm length. Every size takes the same 10mm (0.39in) spanner or socket, so these hex screws are simple to install using standard tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade to DIN 571, so diameter, head and thread geometry are consistent and standards-based across every length\u003c\/li\u003e\n\u003cli\u003eHexagon head is driven with a 10mm (0.39in) spanner or socket rather than a screwdriver, allowing much higher installation torque and a more positive, controllable fixing\u003c\/li\u003e\n\u003cli\u003eSteel construction with a bright zinc-plated (BZP) finish, for general-purpose corrosion resistance\u003c\/li\u003e\n\u003cli\u003eCoarse, deep wood-screw thread bites directly into timber and develops high pull-out resistance without a nut needed on the reverse face\u003c\/li\u003e\n\u003cli\u003eSupplied in eight lengths from 40mm (1.57in) up to 120mm (4.72in), all in a single M6 (6mm) thread diameter, to suit different timber thicknesses and joint depths\u003c\/li\u003e\n\u003cli\u003eThread length is 60% of the overall screw length on every size, giving a longer grip length as the screw gets longer\u003c\/li\u003e\n\u003cli\u003eDoubles as a masonry fixing when paired with a suitable wall plug, for fixing timber into brick, block or concrete as well as timber-to-timber\u003c\/li\u003e\n\u003cli\u003eAlso known as a lag screw or lag bolt – a heavy-duty alternative to a coach bolt where fitting a nut and a full through-hole isn't practical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eLength (l)\u003c\/th\u003e\n\u003cth\u003eThread diameter (d)\u003c\/th\u003e\n\u003cth\u003eHead width across flats (s)\u003c\/th\u003e\n\u003cth\u003eHead height (k)\u003c\/th\u003e\n\u003cth\u003eThread length (Lg)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e40mm (1.57in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e24mm (0.94in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50mm (1.97in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e30mm (1.18in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e60mm (2.36in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e36mm (1.42in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e70mm (2.76in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e42mm (1.65in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e80mm (3.15in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e48mm (1.89in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e90mm (3.54in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e54mm (2.13in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100mm (3.94in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e60mm (2.36in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e120mm (4.72in)\u003c\/td\u003e\n\u003ctd\u003e6mm (0.24in)\u003c\/td\u003e\n\u003ctd\u003e10mm (0.39in)\u003c\/td\u003e\n\u003ctd\u003e4mm (0.16in)\u003c\/td\u003e\n\u003ctd\u003e72mm (2.83in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThread, head and drive dimensions are as specified in DIN 571 for the M6 (6mm) thread size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTimber-to-timber structural and semi-structural connections, such as joists, framing members and posts, where high pull-out resistance is needed but there is no access to fit a nut on the reverse side\u003c\/li\u003e\n\u003cli\u003eOutdoor timber structures such as garden decking frames and joists, pergolas and gazebos, and fence and gate construction, where a spanner-driven fixing gives a controlled, firm tightening in exposed structural timber\u003c\/li\u003e\n\u003cli\u003eHeavy joinery and assembly work, including workbenches and furniture, where a strong, spanner-tightened fixing is preferred over a screwdriver-driven wood screw\u003c\/li\u003e\n\u003cli\u003eFurniture making, interior fittings, and repair and renovation projects in timber\u003c\/li\u003e\n\u003cli\u003eFixing timber battens, brackets or fixtures directly to brick, block or concrete, when the screw is used together with a suitable wall plug\u003c\/li\u003e\n\u003cli\u003eAny general DIY or trade job calling for a robust hexagon-head wood screw that can be tightened to a firm, positive torque, and checked or re-tightened later with the same spanner or socket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Guidance\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eDrill a clearance hole through the first (fixing) timber, sized to the screw's 6mm (0.24in) shank, so this piece can pull down freely onto the timber beneath it\u003c\/li\u003e\n\u003cli\u003eDrill a smaller pilot hole into the second (holding) timber, sized to roughly the thread's root diameter – use a smaller pilot in softer timbers and a slightly larger one in dense hardwoods, to prevent splitting\u003c\/li\u003e\n\u003cli\u003eDrill both holes to at least the full length of the screw being fitted\u003c\/li\u003e\n\u003cli\u003eDrive the screw home with a 10mm (0.39in) spanner or socket – the hexagon head allows significantly higher torque than a screwdriver-driven alternative\u003c\/li\u003e\n\u003cli\u003eFit a washer under the head where practical, to spread the load and stop the head sinking into softer timber\u003c\/li\u003e\n\u003cli\u003eFor fixing into masonry, insert a suitable wall plug into the pre-drilled hole before driving the screw home\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich length do I need?\u003c\/strong\u003e\u003cbr\u003eChoose a length that passes through the timber you are fixing and leaves the threaded part in the timber beneath. Thread length is 60% of the screw length, listed for every size in the table above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spanner or socket fits?\u003c\/strong\u003e\u003cbr\u003eA 10mm (0.39in) spanner or socket fits the head of every length of these hex head screws.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to pre-drill?\u003c\/strong\u003e\u003cbr\u003eYes: a clearance hole through the first timber and a smaller pilot hole into the second, as in the Installation Guidance above, to prevent splitting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I fix them into brick or concrete?\u003c\/strong\u003e\u003cbr\u003eYes, with a suitable wall plug in brick, block or concrete.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use them outdoors?\u003c\/strong\u003e\u003cbr\u003eYes. As exterior coach screws they suit outdoor timber structures such as decking frames, pergolas, gazebos, fences and gates; the manufacturer lists external structures exposed to weather conditions among their uses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat pack sizes are available?\u003c\/strong\u003e\u003cbr\u003ePacks of 1, 2, 5, 10, 20 or 100 screws in every length.\u003c\/p\u003e","brand":"DIYUK","offers":[{"title":"40mm \/ 1","offer_id":53536067256701,"sku":"DIN571-M6X40-01","price":5.47,"currency_code":"GBP","in_stock":true},{"title":"40mm \/ 2","offer_id":53536067289469,"sku":"DIN571-M6X40-02","price":5.47,"currency_code":"GBP","in_stock":true},{"title":"40mm \/ 5","offer_id":53536067322237,"sku":"DIN571-M6X40-05","price":5.6,"currency_code":"GBP","in_stock":true},{"title":"40mm \/ 10","offer_id":53536067355005,"sku":"DIN571-M6X40-10","price":5.85,"currency_code":"GBP","in_stock":true},{"title":"40mm \/ 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