Torx Powerlag T-Star Drive Washer Head Yellow Zinc Coated Lag Screw, 1/4 in. Each diameter is available in two lengths. These items have transitioned to our D E WALT brand and are accessible on this site. Need Help? These lag or expansion shields are used for These lag or expansion shields are used for fastening lag screws into wood and concrete. x 10 in. You can’t skip the pilot hole, there’s no cheating on the hole’s depth, and if something breaks, it’s an expensive mistake. While they are most often used for connecting two pieces of wood together, they can also be used to connect a piece of wood to, for example, a concrete wall. x 4 in. Continue to tighten the screw until the screw head rests flush against the wood and securely anchors the wood to the stucco. Silicone-bronze lag bolts are also resistant to corrosion and are usually used for fastening wood timbers together. Solve for anchor force Æ ∑F =0 The following criteria are to be observed in the. Lag screws (US) or coach screws (UK, Australia, and New Zealand) (also referred to as lag bolts or coach bolts, although this is a misnomer) are large wood screws.The head is typically an external hex. Molly Bolts. Suitable for direct wood mount, simply combine with a plastic wall plug for masonry mounting. Apr 28, 20 11:17 AM. Purchase Lag Shield Anchors. Steel and stainless steel are the most common materials for lag screws. x 1-3/4 in. Lag screws (US) or coach screws (UK, Australia, and New Zealand) (also referred to as lag bolts or coach bolts, although this is a misnomer) are large wood screws.The head is typically an external hex. Lag bolts, 1/2" Hex head. Zinc-plated lag bolts provide the minimum amount of against rust. 5/16 in. A hex head lag screw is a wood screw that is driven with a wrench instead of a screwdriver. Lag screws have a hexagonal-shaped head and are tightened by a wrench (as opposed to wood screws, which have a slotted head and are tightened by a screw driver). It also has a hexagonal shape for use with an open-end or box wrench, or ratchet. x 6 in. Lag screws have thick shafts and coarse threads to firmly grip wood boards, studs and similar pieces. While we aren’t masons ourselves, we hope to prevent you from having to call one. x 8 in. T-Star Washer Head Exterior HCR PowerLag Screw, 1/2 in. Attach a nut driver to the drill. What are Lag shields? Hex heads are six sided for use with a wrench. Generally speaking, a lag bolt passes through two pieces of wood being connected to each other. Another type of lag bolt that can be used for this purpose is the galvanized lag bolt, which is recommended for use in coastal regions. T-Star Washer Head Exterior HCR PowerLag Screw, 3/8 in x 8 in. Mount a lag screw's head into the nut driver. There are numerous technical specifications that must be considered when using Lag Shield Anchors, including diameter, internal thread length, minimum embedment and required hole size. - These items have not yet transitioned to our D E WALT brand. Bryce Fastener’s tamper proof security lag bolts have been specified for wood signs in many National Parks. A lag screw can also be used to fix to masonry using a lag shield anchor or nylon anchor. Lot of 28 Lb Expansion Shields For Lag Screws Bolts - Hillman - Masonry Concrete. Die cast zinc alloy. It is screwed into the second piece of wood and usually penetrates it to between one-third and one-half of its thickness. SKU. Studs are typically spaced 16 inches on center. X 3 in., A307 Grade A Hot Dip Galvanized Steel, 25-Pack Deck Plus hex lag bolts are a grade 2 bolt, perfect for exterior wood projects. Another type of bolt sometimes used in residential construction is the structural bolt, which connects wood to steel or wood to wood. Some anchors are pre-assembled with a screw or have a threaded stud. High-strength toggle anchors provide an extremely strong hold and stay in position when a bolt is removed. • Concrete Rapid Rod hangers can be installed with an adjustable torque, battery powered screw gun or hammer drill. These bolts can generate a high degree of clamping force when tightened. Related Products; Wood screws. Toggle Anchors for Sheet Metal and Wood Screws. Wood screw thread eye bolts (also referred to as vine eyes, screw eye bolts, eye screws, or turned/bent eye lags) have a wood or lag screw thread for use in wood, masonry or lag anchors. I'm trying to get into some DIY projects around the house and need to brush up on my bolt knowledge. x 6 in. They are easy to identify based on their bright blue coating and are used for fastening wood or metal to different masonry materials. Filter selected Show only products on sale In stock only. To install, tap into a drilled hole with a hammer and position your fixture. … A corrosion resistant steel alloy. Used with a lag bolt. How do they work? Hex lag screw fasteners, also called lag bolts, are typically used in wood construction. x 96 in. $25.99 +$7.99 shipping. x 5 in. Abrasives. Sheet metal screws. Some anchors have machine screw threads, while others are designed to be used with wood screws, sheet metal screws, and/or lag screws. Concrete Screw Anchors (1) Fischer Frame Anchors (1) Flat Head Machine Screw (1) Flat Head Sleeve Anchors (2) Flat Head Wood Screws (2) Hit Anchors (1) Lag Shields (1) Lightweight Anchors (3) Sleeve Anchor Extenders (1) Tapper Concrete Screws (2) Threshold Anchors (2) Product Categories. Steel screws are often finished with hot-dip galvanizing or zinc plating. What are expansion shield anchors? Bryce Fastener’s tamper proof security lag bolts have been specified for wood signs in many National Parks. Click on a Lag Bolt type above to continue shopping… Lag Bolts. Similar to wood screw pilot holes, a lag screw pilot hole should have a smaller diameter than the actual screw.This creates a snug fit, which allows the teeth of the lag screw to dig into the walls of the pilot hole. These anchors fit a range of sheet metal and wood screw sizes since they form their own threads when installed. They are designed to securely join wood pieces together in heavy load applications. Lag Bolt Kit for Mounting A TV Into Wood Or Concrete - Includes Heavy Duty Bolts, Fischer Concrete Anchors and 2 Drill Bits Visit the ECHOGEAR Store. As a result, we have to rely on friction alone to secure a fastener. Wood Screw-Style Hangers. Also known as lag shields, these anchors are designed to be used with large-diameter wood screws. Square Neck Carriage Bolts; View All Categories In that case, they are used together with “lags” – an insert that ensures the screw stays tightly in the wall. Masonry drop-in anchors are medium-duty anchors mostly used in solid concrete. Now we’re getting into the really strong drywall anchors, and these are ones that you can use on pretty much any material—not just drywall. • UL & FM approved. The size of the anchor refers to the diameter of the lag bolt to be used with this fastener. Powerlag Hex Drive Washer Head High Corrosion Resistant Coating Lag Screw, 1/4 in. Short lengths are fully threaded. Timber Lag Screw (25 Per Box), 7 lb. The thread tapers to a sharp point at its end to help engage the screw by embedding into the surface of the wood. The most common method is to install ½” lag bolts with washers or carriage bolts with washers. A lag bolt, or lag screw, is a type of fastener used for making mechanical connections between two pieces of wood to ensure that they are held together securely. Learn about a little known plugin that tells you if you're getting the best price on Amazon. Align the wood's hole with the hole in the stucco. There are also a few other differences between lag screws and wood screws. © 2000-2020 Home Depot Product Authority, LLC. Anchors & Lags. Masonry sleeves and wedges are driven into a pre-drilled hole and expanded by turning a nut threaded onto the anchor shaft. Then, insert a lag screw and tighten. View on Grid List. Any homeowner who loves outdoor entertaining takes pride in their house’s patio. Among the more common materials used to make them are zinc-plated and hot dipped galvanized steel — which are usually reasonably priced and provide some resistance to rust — and stainless steel and silicone bronze, for applications where high corrosion resistance is needed. @ emartin74 - Good question. Rated for heavy loads in concrete and masonry. Local store prices may vary from those displayed. The threaded portion contains a helical structure that allows the screw to be advanced and tightened when rotated clockwise. Anchor bolts Manufacturers, Factory, Suppliers From China, We aim at Ongoing system innovation, management innovation, elite innovation and market innovation, give full play to the overall advantages, and constantly improve service quality. Wood Screw-Style Hangers. RSS Alternative Lag Screw, 3/8 in. The minimum threaded length for longer lengths is one-half the bolt length plus 1/2", or 6", whichever is shorter. Using the auger for an anchor idea works, but if you have to move to find the fish. The most common stainless steel for general hardware use. Wood-Knocker®II+. Foundation bolts, typically embedded in concrete or grouted masonry, are commonly referred to as anchor bolts, J-bolts, or mud-sill anchors. Just keep it simple if you can...I'm not quite Bob Vila yet! Stainless steel lag bolts are highly resistant to corrosion from moisture and saltwater, so they would be good to use if you were building a deck on an oceanfront condo or house. Table 6. To find a lag screw with sufficient length, consider the depth of embedment of the shield, the thickness of the material being fastened and the space required for any washers. Deck Plus hex lag bolts are a grade 2 bolt, perfect for exterior wood projects. Hammer Drive Anchor. How to install lag shield concrete anchors. Lag screws are also known as lag bolts and are typically a larger type of screw used to secure heavy wood beams or to fasten wood to masonry or concrete. I just want to put up two 6x6 posts with Titan Wood Post Anchors, either 35 or 70 apart, Read More. Bolt Base 8mm A2 Stainless Steel Coach Screws Hex Head Lag Bolts Wood Screw Bolt DIN 571 M8 X 100-30. They are thicker than ordinary screws, have a hexagonal head, and they are used in a myriad of materials to create structural integrity where it is needed most. x 6 in. Clear Acrylic Sheet, Lysol 19 oz. An alloy consisting of approximately 95% zinc alloyed with aluminum, copper and other elements for good corrosion resistance. Zinc-Alloy Long Lag Shields (20-Pack) These lag or expansion shields are used for These lag or expansion shields are used for fastening lag screws into fastening into wood and concrete. Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood. Dimensions. Turf Builder Kentucky Bluegrass Mix Seed, Battery Operated Smoke and Carbon Monoxide Combination Detector with Voice Alarm and Ionization Sensor, 48 in. 1/4 in. x 1/8 in. A lag screw is the poor man's concrete anchor. Drop-in-Anchors for Sealing / Swings; Contact Washers. Ideal in salt water and chlorine environments. Lag bolts are tightened and loosened by applying torque to the head of the bolt using a tool. Their use varies based on the type of head and thread but are generally bigger and longer than wood screws. • Wood rapid rods can be installed with a screw gun or hammer drill. Bolts 7–14 Bearing Stress of Wood Under Bolts 7–14 Loads at an Angle to the Grain 7–14 Steel Side Plates 7–15 Bolt Quality 7–15 Effect of Member Thickness 7–15 Two-Member, Multiple-Member Joints 7–15 Spacing, Edge, and End Distance 7–16 Effect of Bolt Holes 7–16 Pre-1991 Allowable Loads 7–17 Post-1991 Yield Model 7–18 Connector Joints 7–18 Parallel-to-Grain Loading 7– Hex Galvanized Lag Screw Lag Screws are hex head screws with thick Lag Screws are hex head screws with thick shafts and coarse threads. All home centers carry a large assortment of lag bolts screw sizes. Typical sizes available are from 1/4″ to 3/4″ diameter, and 1″ to 16″ in length. Amazon Doesn't Want You to Know About This Plugin. Home / ALL / Fasteners & Rivets / Lag Bolts. How much weight can a 2.5 inch screw hold? 4.7 out of 5 stars 217 ratings | 17 answered questions Amazon's Choice recommends highly rated and well-priced products. They have a large head on one end and a cylindrical shaft with smooth and externally threaded parts along its length. Drive the lag bolts into the holes on the anchor and wooden post. Showing 1– 12 of 24 results. This bolt has a duplex coating that is 2X more corrosion resistant than galvanized fasteners and provides 4 layers of protection from sun, rain, snow, and chemicals. Being used for structurally important joints, lag bolts are often considerably thicker than regular wood screws. Drop-In Anchors. The reduced portion near Common uses include frames and outdoor play equipment. $75.00 +$8.00 shipping. Nothing says ‘summer’ quite like grilling. The head of the bolt is larger than the threaded portion to provide a positive mechanical stop and to allow a tool to be used when tightening. Powerlag Hex Drive Washer Head Zinc Coated Lag Screw, 1/2 in. I was wondering how these concrete screws compare to using a typical lag bolt & lag shield anchor? Likewise, how much weight can a 5/16 lag bolt hold? Used in concrete with Lag Shields.Stainless steel 18-8 is an alloy of steel with high corrosion resistance. What are expansion shield anchors? Screws with a smooth shank and tapered point for use in wood. The first piece of wood has a pilot, or clearance, hole that allows the bolt to freely pass through without screwing into the material. These anchors fit a range of sheet metal and wood screw sizes since they form their own threads when installed. 1/2 in. Screw-Bolt+™ 316 Stainless Steel Wedge-Bolt™ UltraCon®+ UltraCon® UltraCon® SS4. Shop lag screws and a variety of hardware products online at Lowes.com. They can also be used in concrete, but require a special insert, called a lag. Stainless steel 18-8. Lag bolts have coarse, widely spaced threads (10 threads per inch for a 1/4" bolt, declining to just 3 1/4 threads per inch for a 1 1/4" lag bolt); threading is standard right-hand. Next, take your screw and drive it into the anchor, stopping when it feels snug. A lag bolt, or lag screw, is a type of fastener used for making mechanical connections between two pieces of wood to ensure that they are held together securely. A number of variables that may change the required pilot hole dimensions, such as bolt diameter, length, and species of wood that you're screwing into. With northern white pine, Douglas fir, and white oak only lag screws of %-inch shank diameter were used. Application: The lag bolt kit fit for concrete wall, wood studs and brick wall Material: High quality plastic anchor, Zinc plated lag screws and alloy steel drill bits Package: The kit includes 4 lag screws, 4 concrete anchors, 4 washers,2 kinds of drill bits Note: Concrete anchors are not compatible with wood and drywall Warranty: 2 years › See more product details. Browse our wide selection of lag … The shorter length reduces drilling time; the longer length provides more strength. x 5 in. Sometimes the tip will break off entirely, sometimes not. Powerlag Hex Drive Washer Head High Corrosion Resistant Coating Lag Screw, 1/4 in. x 1-3/4 in. Anchors Per Pack. You can refer to a lag shield anchor by the size of the lag screw, or by the inside diameter of the anchor. The expansion shield acts as an anchoring point into a concrete slab or foundation, expanding when the screw threads are engaged during installation. Lag bolts are used to fasten wood to wood and metal to wood, attach objects to wood, and affix items to concrete and masonry when combined with lag expansion shields. This will significantly weaken the ledger board. http://www.confast.com/products/lag-shield-anchor.aspx The screws were tested at effective depths of 1, 2, 3, and 4 inches. 280CJ425 242C 1/4" S. 058060323249 50 220. Find Wood to wood lag screws at Lowe's today. Powerlag Hex Drive Washer Head High Corrosion Resistant Coating Lag Screw, 1/4 in. Safe weight loads (Ibs) Drill size. Light Duty Anchors Concrete Anchor Screws Mungo Nylon Plugs Mungo Nylon Anchors Plastic Spaghetti Plastic Plugs Nylon Nail In Anchors Insulation Anchors Metal Nail In Anchors Multi-Purpose Wall-Dog Anchor Screws. Mounting surface. Eye bolts are commonly used to attach cables to objects. These specialized connectors are available in a variety of sizes and threads. Lag bolts screws cost a third of the price of structural screws. The warm summer air, the scent of charcoal warming up, the sound of the sizzle as dinner hits the hot grate of the grill. Stainless steel 316. Drive these into wood with an adjustable wrench, pliers, or a special driver tool. Snake+® Smart DI Anchors & Accessories. • Made of Zinc Plated carbon steel. Bar code. You will usually need the length of the bolt to be at least 4”- 6" to penetrate through the 2x ledger board, the house sheathing and into the solid house rim. Wood Screw-Style Hangers. Structurally rated lag bolts screws are available, but most home centers carry generic versions of varying quality. Sleeve Anchors use a pre-installed screw or threaded stud to expand the anchor once inside the hole. Since wood lag screws are usually used to connect heavy lumber, or other heavy materials that are bearing an intense load, they require a nut which adds extra strength and security. 4.6 out of 5 stars 3. Part wood screw & part bolt—lag screws are a beast of their own. Products shown as available are normally stocked but inventory levels cannot be guaranteed, For screen reader problems with this website, please call 1-800-430-3376 or text 38698 (standard carrier rates apply to texts), #10 x 3-1/8 in. Pan-Knocker™II+. A highly corrosion resistant grade of stainless steel. Metric hex-headed lag screws are covered by DIN 571. Drive the screw into the stud until the screw's head pulls the wood flush against the stucco surface. Inch square-headed and hex-headed lag screws are covered by ASME B18.2.1. ACB - Concrete Anchor Bolt 4 - #4 75 - 3 ... Lower in-place cost, when compared to beam clamps, lag bolts and drop-ins. How Do Lag Shield Anchors Work? Clamp together two pieces of wood the sizes of the ones you want to screw together. Use of this site is subject to certain Terms Of Use. Unlike wood screws that thread as they enter, hex head lag screws require a hole to be drilled before they can be used. Our Lags are manufactured with an oversized Raptor™ Button Head. The size selected for a particular job should be consistent with the size of the pieces of wood being connected, and the forces needed to secure the mechanical connection. Prime-Line 9056313 Hex Lag Screws, 3/8 in. When you need to fasten wood-to-wood, metal-to-wood, attach objects to wood, or affix items to concrete and masonry, the lag bolt is an ideal choice to combine materials. These are driven into a pre-drilled hole the same size as the casing and for a lag shield, a lag bolt is driven in forcing it to expand and press against the sides of the hole. The Lag Shield Anchor is a great fastener when very hard (short) concrete or lower grade (long) concrete is a concern. In most instances 5/16-inch-diameter lag bolts are sufficient. They are available in bolt diameters ranging from ¼” to ¾”. The expansion shield acts as an anchoring point into a concrete slab or foundation, expanding when the screw threads are engaged during installation. Wood Screw-Style Hangers. Call Empire Bolt & Screw or send us a Request for Quote on your Lag Screw Shield Anchor … DEWALT Deck Insert™+ (DDI+™) Screw Anchors. Standard-Security level Penta Head lag bolts are available by special order. Available in both Phillips flat head (for flush finishes) and hex head (for ease of installation). Metric PC4.6 Cup Head Bolts & Nuts Metric PC4.6 Coach Screws BSW G2 Cup Head Bolts & Nuts. Print Hangermate is an all steel threaded fastening system for suspending steel threaded rod vertically overhead in pipe hanging, fire protection, electrical conduit and cable-tray applications. Please call us at: 1-800-HOME-DEPOT (1-800-466-3337), Please enter in your email address in the following format: you@domain.com. Can anybody tell me what different types of lag bolts there are, and what are they used for? This is what it looks like on the other side. Many anchors cannot be used for overhead applications. LAG Bolts; Mild Steel T Nuts. Total height of low level ground level deck. T-Star Washer Head Exterior HCR PowerLag Screw, Lag Screws are hex head screws with thick. CD Weld Studs; Pta Lag Bolt. This means that an anchor is required to effectively grip our bolt inside of the hole. Hangermate ® Pivot For Wood - Angled Applications Rod Hanging Anchors for Wood. Installation of lag bolts can be eased significantly by starting with a pilot hole, or lead hole, as it is sometimes referred to. Installing Lag Shields: Step-by-Step Instructions. The most common alternative design bolt is the twist-off bolt or tension control (TC) bolt. Is Amazon actually giving you the best price? Lag bolts are large wood screws with hexagonal heads often called a lag screw. How do they work? In these cases, you will most likely need to supply the screw. The mating surfaces resist the force being applied by the bolt and help to prevent the connection from loosening over time. Crete-Flex® Aggre-Gator® Tapper™ Tapper+® Sleeve Anchors; Power-Bolt®+ Lok-Bolt AS® Power-Bolt® Bolt & Shield Anchors. Measure the width of the combined pieces. Structurally rated lag bolts screws are available, but most home centers carry generic versions of varying quality. Tighten the bolts, using a socket wrench. High Tensile ... Hex Head PBI Brace-It Anchors Hex PSA Structural Anchors. Press the screw tip through the wood and through the hole in the stucco until the tip rests against the stud. Had to chose between putting the shanty down to move or stay put. This little known plugin reveals the answer. They can also be used in concrete, but require a special insert, called a lag. Metric hex-headed lag screws are covered by DIN 571. The black color lends a low profile that blends in well with surroundings and matches the latest trends in hardware. If you use the lag bolts, make it easier on yourself and take a cordless drill with you. LAG122-BOX LAG122-BOX 1/2″ x 2″ LAG BOLT (ZINC) $ 26.15. These fasteners are directly screwed into wood. x 6 in. Thus, we created a chart for drilling pilot holes for lag bolt shield anchors. 1/2" 280CJ510 243C 5/16" S. 058060323362 50 276. Purchase Lag Shield Anchors. All Rights Reserved. The chart below can be used to identify commonly accepted hole sizes. Short length Lag Screw Shield Anchors are advisable in harder base materials, while the long length anchors should be utilized in softer base materials. Also, lag screws take advantage of a nut on one side to help hold things together; the tight fit of the wood screw negates the need for a nut. This is important because security lag screws and lag bolts are used in high torque applications such as pressure treated wood, concrete lag inserts, and pre-drilled plastic. Lag shields. Lag Screws can also be used in masonry if combined with a lag shield. While more common wood and sheet metal screws are available in multiple head types, lag screws are only available with hex heads. They reinforce the hole and resist stripping. Commonly used for decks, framing, retaining walls, and wooden playground equipment. For a sleeve, this forces it to crimp and push against the hole. This helps them hold better in wood than standard Hex or Penta Head security lag screws. Packaging. All home centers carry a large assortment of lag bolts screw sizes. Toggle Anchors for Sheet Metal and Wood Screws. Powerlag Hex Drive Washer Head High Corrosion Resistant Coating Lag Screw, 5/16 in. T-Nuts; Carriage Bolts. The black color lends a low profile that blends in well with surroundings and matches the latest trends in hardware. The Lag Shield Anchor is a great fastener when very hard (short) concrete or lower grade (long) concrete is a concern. Recommended for all types of wood or metal to wood construction where standard wood or deck screws or nails are too short or light. Set the wooden post in place on the wooden floor. D-Nut; Weld Studs. Sleeve Anchors. Unlike wood and some plastics, concrete and masonry lack the elasticity that allows for certain materials to compress upon impact. Inch square-headed and hex-headed lag screws are covered by ASME B18.2.1. Lag screws are extremely tough fasteners that are very large in size compared to ordinary screws (1/4” in diameter or larger). Never counter sink bolts. Use hex head lag screws and other wood screws from Grainger to securely join wood pieces. 8. Star Drive Washer Head RSS Structural Screws (50-Pack), 3/8 in. If a lag screw with a 5/16-inch shaft is installed correctly, it can withstand pull-out, or withdrawal, of up to 212 pounds in close-grain hem, fir and redwood, and up to 266 pounds in larch Douglas fir, according to information from the American Wood Council.. How deep should a lag bolt go? Lag Screws are hex head screws with thick shafts and coarse threads. x 6 in. Zinc anchor with internal thread for lag bolt ; Installs flush to surface; Corrosion resistant; Installation Tools. A lag, wood or sheet metal screw (not supplied) expands and compresses the anchor causing it to conform to the surface of the hole. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. DRILL BIT Per Pack. Make Offer - Lot of 28 Lb Expansion Shields For Lag Screws Bolts - Hillman - Masonry Concrete. Lag bolts screws cost a third of the price of structural screws. lag screw into the member receiving the point, three sizes of lag screws, one-half, five-eighths, and three-fourths inch, were used with redwood. A medium duty anchor for use in concrete, brick, or a mortar joint. What are Lag shields? They are manufactured using different materials for varied applications. Long Code. Lot Of 41- 1/4" x 1-1/2" Universal Brand Lag Shield Anchor, 1/2" Hole. They are designed to securely join wood pieces together in heavy load applications. Fastening a lag bolt to a masonry base is no easy task. Drill Press 0 Threaded Rods 0 TIG 0 Tilt Adjustable 0 Tubular 0 Washers 0 Wedge Anchors - for concrete 0 Wood Screws 0 Wrenches/Spanners 0 . The smooth section of the length is located directly below the head. Curved Washer DIN 137A; Wood Insert Nut. Commonly used for decks, framing, retaining walls, and wooden playground equipment. Once all these factors have been determined, you can find the expected holding values in the technical information below. There are different types of lag bolts that can be used depending on what you’re fastening. Select a lag bolt that's 1/4 inch shorter than the accumulated width of the two pieces. Mount to Stud Step 1 Locate studs with a stud finder from the building's interior or by stretching a tape measure from the exterior wall corner to the wall's center. Make Offer - Lot Of 41- 1/4" x 1-1/2" Universal Brand Lag Shield Anchor, 1/2" Hole. These bolts are often used to fasten large beams and posts used for decking, wooden bridges, and other wooden structures. original Disinfectant Spray-04650, Hydro Crunch Expanded Clay Growing Media Hydroponic 50 Liter 8 mm Aggregate Pebbles Pellets-803000. A lag bolt, or lag screw, is a type of fastener used for making mechanical connections between two pieces of wood to ensure that they are held together securely.These bolts are often used to fasten large beams and posts used for decking, wooden bridges, and other wooden structures.