{"title":"Lag Shield Anchors for Masonry \u0026 Concrete Fastening | Zinc Alloy | For DIN 571 Lag Screws","description":"\u003ch2\u003eFULLERKREG Lag Shield Anchors — Zinc Alloy | For Use with DIN 571 Lag Screws\u003c\/h2\u003e\n\n\u003cp\u003eFULLERKREG lag shield anchors are heavy-duty expansion anchors designed for secure fastening into \u003cstrong\u003econcrete, brick, block, and solid masonry\u003c\/strong\u003e substrates. When a DIN 571 hex head lag screw is driven into the shield, the anchor expands outward against the hole wall, generating high radial clamping force for a reliable, load-bearing connection.\u003c\/p\u003e\n\n\u003cp\u003eManufactured from \u003cstrong\u003edie-cast zinc alloy\u003c\/strong\u003e, FULLERKREG lag shields offer excellent corrosion resistance, dimensional consistency, and reliable expansion performance across a wide range of base materials.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:20%;padding:4px;text-align:center;vertical-align:middle;\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/01_0c90b8ef-bdc1-4951-ae2b-bd675b4560d8.png?v=1779173358\" alt=\"Lag Shield Anchor Product Overview\" style=\"width:100%;height:auto;display:block;\"\u003e\n      \u003c\/td\u003e\n      \u003ctd style=\"width:20%;padding:4px;text-align:center;vertical-align:middle;\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/02.png?v=1779173346\" alt=\"Lag Shield Anchor Structure Diagram\" style=\"width:100%;height:auto;display:block;\"\u003e\n      \u003c\/td\u003e\n      \u003ctd style=\"width:20%;padding:4px;text-align:center;vertical-align:middle;\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/03_a92ff1ac-d7e0-4e29-a5c0-c175f068f6b1.png?v=1779173350\" alt=\"Lag Shield Anchor Installation Steps\" style=\"width:100%;height:auto;display:block;\"\u003e\n      \u003c\/td\u003e\n      \u003ctd style=\"width:20%;padding:4px;text-align:center;vertical-align:middle;\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/04_b89e6e25-dce6-4619-8bba-09b9214d981c.png?v=1779173353\" alt=\"Lag Shield Anchor Short vs Long Comparison\" style=\"width:100%;height:auto;display:block;\"\u003e\n      \u003c\/td\u003e\n      \u003ctd style=\"width:20%;padding:4px;text-align:center;vertical-align:middle;\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/files\/05_553402df-6ee2-4ff3-8452-a6592cb7a1bc.png?v=1779173358\" alt=\"Lag Shield Anchor Dimensional Drawing\" style=\"width:100%;height:auto;display:block;\"\u003e\n      \u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Die-cast zinc alloy — corrosion-resistant, dimensionally precise, consistent expansion performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnchor Type:\u003c\/strong\u003e Lag shield (shell expansion anchor) — expands radially as lag screw is driven in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Fastener:\u003c\/strong\u003e DIN 571 hex head lag screws (coach screws, metric thread)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBase Materials:\u003c\/strong\u003e Concrete (normal and lightweight), solid brick, hollow brick, concrete block, natural stone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTypes Available:\u003c\/strong\u003e Short (S) and Long (L) — short for hard\/dense substrates; long for softer or hollow-core masonry\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Hammer-set into pre-drilled hole; no special tooling required beyond standard drill and wrench\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReusability:\u003c\/strong\u003e Lag screw can be removed and re-driven; anchor remains in place\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eHow Lag Shield Anchors Work\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill:\u003c\/strong\u003e Drill a hole in the masonry substrate to the specified diameter and minimum embedment depth using a carbide-tipped masonry bit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean:\u003c\/strong\u003e Remove dust and debris from the hole (blow out or vacuum).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert:\u003c\/strong\u003e Tap the lag shield into the hole flush with or slightly below the surface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Pass the DIN 571 lag screw through the fixture and into the shield. As the screw is tightened, the shield expands outward against the hole wall.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTorque:\u003c\/strong\u003e Tighten to the recommended installation torque for the anchor size. The expansion is complete when the screw meets resistance.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eShort Type vs. Long Type\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eType\u003c\/th\u003e\n      \u003cth\u003eDescription\u003c\/th\u003e\n      \u003cth\u003eBest For\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eShort (S)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eShorter body, single-piece expansion\u003c\/td\u003e\n      \u003ctd\u003eHard concrete, dense solid brick, natural stone — high-strength base materials\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eLong (L)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eLonger body, greater embedment depth\u003c\/td\u003e\n      \u003ctd\u003eSofter masonry, lightweight concrete block, hollow brick — lower-strength or porous substrates\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n\u003cp\u003eAll dimensions per standard lag shield anchor specifications. Anchor body length (L) refers to the overall length of the shield body before installation.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eAnchor Size\u003c\/th\u003e\n      \u003cth\u003eDIN 571 Screw Dia.\u003c\/th\u003e\n      \u003cth\u003eDrill Bit Dia. (mm)\u003c\/th\u003e\n      \u003cth\u003eShort Body Length (mm)\u003c\/th\u003e\n      \u003cth\u003eLong Body Length (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Embedment — Short (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Embedment — Long (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Hole Depth — Short (mm)\u003c\/th\u003e\n      \u003cth\u003eMin. Hole Depth — Long (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/4\" (M6)\u003c\/td\u003e\n\u003ctd\u003e1\/4\" \/ M6\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e38\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003e44\u003c\/td\u003e\n\u003ctd\u003e38\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/16\" (M8)\u003c\/td\u003e\n\u003ctd\u003e5\/16\" \/ M8\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003e44\u003c\/td\u003e\n\u003ctd\u003e38\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e44\u003c\/td\u003e\n\u003ctd\u003e57\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/8\" (M10)\u003c\/td\u003e\n\u003ctd\u003e3\/8\" \/ M10\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003e38\u003c\/td\u003e\n\u003ctd\u003e57\u003c\/td\u003e\n\u003ctd\u003e44\u003c\/td\u003e\n\u003ctd\u003e63\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/2\" (M12)\u003c\/td\u003e\n\u003ctd\u003e1\/2\" \/ M12\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e76\u003c\/td\u003e\n\u003ctd\u003e57\u003c\/td\u003e\n\u003ctd\u003e82\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e89\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/8\" (M16)\u003c\/td\u003e\n\u003ctd\u003e5\/8\" \/ M16\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e95\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e102\u003c\/td\u003e\n\u003ctd\u003e76\u003c\/td\u003e\n\u003ctd\u003e108\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/4\" (M20)\u003c\/td\u003e\n\u003ctd\u003e3\/4\" \/ M20\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e76\u003c\/td\u003e\n\u003ctd\u003e114\u003c\/td\u003e\n\u003ctd\u003e82\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e89\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eDimensions are nominal reference values. Always verify against the specific product datasheet for your application. Hole depth = embedment depth + fixture thickness allowance.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eCompatible Fastener: DIN 571 Lag Screw\u003c\/h3\u003e\n\u003cp\u003eFULLERKREG lag shield anchors are specifically designed for use with \u003cstrong\u003eDIN 571 hex head lag screws\u003c\/strong\u003e (also known as coach screws). Key pairing requirements:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatch the lag screw nominal diameter to the anchor size designation (e.g., M10 lag screw → 3\/8\" lag shield)\u003c\/li\u003e\n  \u003cli\u003eLag screw length must be sufficient to engage the full depth of the shield body plus the fixture thickness\u003c\/li\u003e\n  \u003cli\u003eDIN 571 lag screws have a coarse wood-screw thread form that engages the interior of the zinc alloy shield as it expands\u003c\/li\u003e\n  \u003cli\u003eDo not substitute with machine screws or bolts — the thread form and taper are specific to lag screw geometry\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eLoad Capacity Guidance\u003c\/h3\u003e\n\u003cp\u003eActual load capacities depend on base material strength, embedment depth, anchor type (short\/long), and installation quality. The following are general reference ranges for \u003cstrong\u003enormal-weight concrete (≥ 25 MPa \/ 3,600 psi)\u003c\/strong\u003e:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eAnchor Size\u003c\/th\u003e\n      \u003cth\u003eType\u003c\/th\u003e\n      \u003cth\u003eApprox. Tensile Load (kN)\u003c\/th\u003e\n      \u003cth\u003eApprox. Shear Load (kN)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/4\" (M6)\u003c\/td\u003e\n\u003ctd\u003eShort\u003c\/td\u003e\n\u003ctd\u003e2.2 – 3.1\u003c\/td\u003e\n\u003ctd\u003e1.8 – 2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/8\" (M10)\u003c\/td\u003e\n\u003ctd\u003eShort\u003c\/td\u003e\n\u003ctd\u003e5.3 – 7.1\u003c\/td\u003e\n\u003ctd\u003e4.0 – 5.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/8\" (M10)\u003c\/td\u003e\n\u003ctd\u003eLong\u003c\/td\u003e\n\u003ctd\u003e6.7 – 8.9\u003c\/td\u003e\n\u003ctd\u003e5.3 – 7.1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/2\" (M12)\u003c\/td\u003e\n\u003ctd\u003eShort\u003c\/td\u003e\n\u003ctd\u003e8.0 – 11.1\u003c\/td\u003e\n\u003ctd\u003e6.2 – 8.9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/2\" (M12)\u003c\/td\u003e\n\u003ctd\u003eLong\u003c\/td\u003e\n\u003ctd\u003e10.7 – 14.2\u003c\/td\u003e\n\u003ctd\u003e8.0 – 11.1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/8\" (M16)\u003c\/td\u003e\n\u003ctd\u003eLong\u003c\/td\u003e\n\u003ctd\u003e15.6 – 20.0\u003c\/td\u003e\n\u003ctd\u003e11.6 – 15.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/4\" (M20)\u003c\/td\u003e\n\u003ctd\u003eLong\u003c\/td\u003e\n\u003ctd\u003e22.2 – 28.9\u003c\/td\u003e\n\u003ctd\u003e16.9 – 22.2\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eValues are indicative only. For structural or safety-critical applications, consult a qualified engineer and refer to project-specific pull-out test data. Loads shown are ultimate values; apply appropriate safety factors per local building codes.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnchoring wood sill plates, ledger boards, and structural lumber to concrete foundations\u003c\/li\u003e\n  \u003cli\u003eSecuring shelving brackets, handrails, and guardrails to masonry walls\u003c\/li\u003e\n  \u003cli\u003eMounting electrical conduit, pipe hangers, and HVAC supports to concrete ceilings and walls\u003c\/li\u003e\n  \u003cli\u003eAttaching door frames, window frames, and curtain wall elements to block or brick\u003c\/li\u003e\n  \u003cli\u003eFixing machinery bases, equipment pads, and anchor bolts in industrial settings\u003c\/li\u003e\n  \u003cli\u003eGeneral construction, renovation, and MRO fastening into masonry substrates\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eInstallation Best Practices\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill perpendicular:\u003c\/strong\u003e Ensure the hole is drilled straight and perpendicular to the surface for uniform expansion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrect bit size:\u003c\/strong\u003e Use the exact recommended carbide-tipped masonry drill bit diameter — oversized holes reduce holding power significantly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean the hole:\u003c\/strong\u003e Blow out or vacuum all dust before inserting the anchor; debris reduces expansion contact area.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull insertion:\u003c\/strong\u003e Drive the shield fully into the hole so it is flush or slightly recessed — do not leave it proud of the surface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDo not over-torque:\u003c\/strong\u003e Tighten the lag screw to the recommended torque. Over-torquing can strip the shield or crack the base material.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEdge and spacing distances:\u003c\/strong\u003e Maintain minimum edge distance ≥ 5× anchor diameter and center-to-center spacing ≥ 10× anchor diameter to prevent concrete splitting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvoid cracked concrete:\u003c\/strong\u003e Lag shield anchors are not rated for use in cracked concrete. Use seismic-rated anchors for such applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eMaterial: Die-Cast Zinc Alloy\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-pressure die-cast zinc alloy (Zamak-grade equivalent) — consistent wall thickness and dimensional accuracy\u003c\/li\u003e\n  \u003cli\u003eGood corrosion resistance in dry indoor and sheltered outdoor environments\u003c\/li\u003e\n  \u003cli\u003eDuctile enough to expand uniformly without cracking under installation torque\u003c\/li\u003e\n  \u003cli\u003eNon-sparking — suitable for use in environments with flammable materials\u003c\/li\u003e\n  \u003cli\u003eNot recommended for prolonged immersion or highly corrosive (marine\/chemical) environments without additional protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePackaging \u0026amp; Supply\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in standard retail boxes (anchor only) and combo packs (anchor + DIN 571 lag screw)\u003c\/li\u003e\n  \u003cli\u003eBulk supply available for contractors, distributors, and OEM customers\u003c\/li\u003e\n  \u003cli\u003ePackaging quantities: 25 pcs, 50 pcs, 100 pcs, 500 pcs per box (custom quantities on request)\u003c\/li\u003e\n  \u003cli\u003eFull dimensional and material documentation available on request\u003c\/li\u003e\n  \u003cli\u003eB2B wholesale pricing available — contact FULLERKREG for volume quotations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Choose FULLERKREG Lag Shield Anchors?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDie-cast zinc alloy construction ensures consistent wall thickness and reliable, uniform expansion every time\u003c\/li\u003e\n  \u003cli\u003ePrecisely matched to DIN 571 lag screw thread geometry for optimal engagement and holding power\u003c\/li\u003e\n  \u003cli\u003eShort and Long types available to match substrate hardness and embedment requirements\u003c\/li\u003e\n  \u003cli\u003eFull size range from 1\/4\" to 3\/4\" (M6–M20) for versatile application coverage\u003c\/li\u003e\n  \u003cli\u003eCompetitive lead times for standard sizes; custom configurations on request\u003c\/li\u003e\n  \u003cli\u003eConsistent quality with dimensional inspection and material certification available\u003c\/li\u003e\n\u003c\/ul\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/lag-shield-anchor.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}