I wouldn't recommend anything bigger than 5\16ths, 11\32 is only 1\32 smaller than the bolt itself, which your threads are not going to bite enough. 8mm would be roughly the same …Flat Working with Screws Use soap or wax to lubricate screws in hardwoods. To prevent brass screw heads from twisting off in hardwood use a steel screw of the same gauge to thread the wood, then insert the brass screw. Your screwdriver bit is less likely to slip when you use Phillips or Robertson style screws.The first one went in fine the 2nd was a bit more of a challenge and I think I went to 5/16" after the bolt started to angle. So would 11/32 be too big? I wouldn't recommend anything bigger than 5\16ths, 11\32 is only 1\32 smaller than the bolt itself, which your threads are not going to bite enough. The pilot hole required depends on the density of wood being used. For a 1/4-inch lag bolt attached to softwood, the appropriate pilot hole size is 3/32 inch. Medium-density wood requires a 5/32-inch hole, and hardwood requires a 3/16-inch ...Pilot Hole for Lag Screws . Pilot hole size can range as follows: Soft Wood 40% to 70% of the shank diameter for wood with G ≤ 0.5. Medium Wood 60% to 75% of the shank diameter for wood with 0.5 ; G ≤ 0.6. Hard Wood 65% to 85% of the shank diameter for wood with a specific gravity (G) > 0.6. Typical Pilot Hole (Drill Bit) Sizes for selected ... The head of the screw closes the hole off with precision, leaving no damaged fibres around the head. R4™ screws 2" and longer have a four threaded CEE Thread. This enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily. It increases the screw’s drawing strength and reducesThreading at both ends is standard right-hand, so turn the screw clockwise to install. An unthreaded body section, called a plain center, allows locking pliers to be used without damaging threads. Common sizes are 3/16" [#10], 1/4", 5/16" and 3/8" in diameter and lengths range from 1 1/2" to 4". Measure length from end to end. Place the anchor in the pilot hole and tap it into the wall until the anchor is completely inserted. It is best to use a rubber mallet for this task. You’ll have to drill a larger pilot hole for toggle bolts and steel hollow wall anchors. Once the anchor is inserted, use a screwdriver to drive the screw securely into the anchor.Oct 5, 2016 · Pilot Hole and Shank Clearance Hole Boring Recommendations for Wood Screws. Screw. Diameter. Bit or Drill Sizes. No of Auger Bit. To Counterbore for striking head. For Shank Clearance Holes. For Pilot Holes. Hard Woods. 5/8″. 7/8″. 3/4″. 1″. If you’re looking to fasten lag screws to wood, we have a better guide for you! Checkout our article, Drilling Pilot Holes for Lag Screws. We’ll run you through the appropriate pilot hole sizes for both hardwoods & softwoods.Jul 14, 2021 ... How To Drill Pilot Holes ... You will want to make the pilot hole for your lag screw slightly smaller than the diameter of the screw. A tight fit ...Below is the quick and easy chart for most situations. Lag Bolt Size Pilot Hole Size 1/4" 5/32" 5/16" 3/16" 3/8" 15/64" 1/2" 5/16" 5/8" 13/32" 3/4" 1/2" Variables such as wood type, bolt length and bolt …Some of the most reviewed products in 5/16 in Lag Bolts are the Everbilt 5/16 in. x 3 in. Hex Zinc Plated Lag Screw (50-Pack) with 892 reviews, and the Everbilt 5/16 in. x 3 in. Hex Galvanized Lag Screw (25-Pack) with 875 reviews. Lag screws can withstand significant stress over a long period of time; 5/16 in. pilot hole is recommended; Use with a 3/4 in. drive; Includes 1 lag screw to complete your building project; Knowing the correct types of fasteners will make your projects run more smoothly and be more secure. Return PolicyLAG BOLTS Lag screws, also known as lag bolts, are used in wood construc on ... 16” 2” 1/2” LASZ-5620-JR L2SZ-5620-JR 100/JAR 5/16” 2-1/2” 1/2” LASZ-5625-JR ...The head of the screw closes the hole off with precision, leaving no damaged fibres around the head. R4™ screws 2" and longer have a four threaded CEE Thread. This enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily. It increases the screw’s drawing strength and reducesWhen it comes to choosing the right size pilot hole for your lag screw, there are a few things to keep in mind. First, the diameter of the screw dictates the size of the pilot hole. A 1/4″ diameter screw requires a 3/16″ pilot hole, for example. Second, the length of the screw also plays a role in determining the size of the pilot hole.Lag Screw Pilot Hole. I am pretty sure poplar is technically a hardwood. But to me it is a little on the soft side of hard. I was looking at recommended pilot hole sizes for 1/4" lag screws in wood and it recommends: 3/16 for soft and 7/32 for hard. Will a 32nd matter much, if I do not have a 7/32nd drill bit?Uttar Pradesh State Corporation Corporation (Y) Maintenance Unit. Setu Bhawan, 16 Madan Mohan Malviya Marg. 537. District Manager UUP Cooperative Federation Ltd. Varaibirwa Kanpur Road, Lucknow. 538. Director and chief engineer. Rural Engineer Service, Jawahar Bhawan. 539.On installation the Lag Bolt passes through two pieces of wood being connected, the first piece of wood has a pilot hole that allows the bolt to freely pass through, while the threads engage into the second piece of wood. Domestic or import are available. Diameter: 3/8″ through 1″. Grades: A307-Grade A, A153-C, 18-8 Stainless Steel.Lag screws can withstand significant stress over a long period of time; A 3/16 in. pilot hole is recommended; Use with a 1/2 in. drive; Includes 1 lag screw to complete your building project; Knowing the correct types of fasteners will make your projects run more smoothly and be more secure. Return PolicySimilar to wood screws, a stepped pilot hole is recommended for lag bolts. The pilot hole for the body (the unthreaded section of the shank adjacent to the head) should match the bolt size (3/8" hole for a 3/8" bolt, for example).Popular Support Pages-> Wood Screws Types Threaded Insert and T-Nut Guide Wood Screw Size Chart PILOT HOLE SIZE CHART. ... Min. Screw Length. 1/4: 5/16: 5/16: 3/8: 7/16: 1/2: 5/8: 11/16: 3/4: 7/8: 3/4: 13/16: 7/8: Max. Screw Length * 5/8: 11/16: 11/16: 5/8: 11/16: 13/16: 7/8: 15/16: 1: 1-1/8: 1-1/4: 1-7/16: 1-9/16: Regular Length Drill :Put a nut on the other end of the lag screw so that the weight it bears is evenly spread along the shaft. If you have the right driver bit for your power drill, you can finish tightening the lag screw with it. Once the screw is securely in place, you can remove the clamps. For comparison's sake, installing one of the other common types of screw ... GRK Fasteners' RSS™ screws that measure 3-1/8" or longer feature a six threaded CEE thread, enlarging the screw hole for the non-threaded portion of the fastener, which then allows wood to settle more easily and increases the screw’s drawing strength.Lag Screw Pilot Hole Sizes Lag Shield Pilot Hole Sizes *(For both Long and Short Lag Shields) Wood Screw Diameter **Use Straight Bit Size ... 7/32 1/4 17/64 19/64 5/16 Size Decimal Fractional Screw Size Hard Wood Countersink Size Soft Wood Countersink Size Size Decimal FractionalPilot Hole Chart for Self Tapping Screws - Anzor Fasteners, Your Stainless Fastener Specialist - Call us on 07 3711 9977 or order online. ... Pilot Hole Diameters for Stainless Steel Screws. Click below to see our self …1. Principles. The function of the cortical lag screw is to compress one piece of bone against another. This improves the stability of a reduction, so it is commonly used to achieve absolute stability, leading to direct bone healing, as opposed to healing with callus. There are various screw types available, and details of the lag screw ...The folks at Jamestown Distributors (www.jamestowndistributors.com; 800-423-0030), who sell a wide variety of fasteners, told me that as a rule of thumb, the lead …In particular note that for hardwoods in all cases the pilot hole diameter is roughly 5% larger than the nominal minor shaft diameter. Note the depth as well, the pilot hole depth for coach screws should be as long as the straight portion of the shaft, not covering the tapered portion. ... Nov 16, 2015 at 5:54.undercuts in the hole, bonding the screw to the wall and sealing the hole to prevent moisture from entering. Optimal holding values [measured in tons] ... 13105 A8 #8 – 5/16" lag No Screw 100 1000 5000 13107 A10 #10 – 3/8" lag No Screw 50 500 2500 41084 A10 #10 – 3/8" lag #14 x 2-1/4 4 40 800Lag Screw Pilot Hole Diameters Guide for Construction • Call or Text (951) 270-1360 • Email [email protected] Pilot holes are typically used to ease the installation of lag bolts. Get your free downloadable chart of commonly accepted pilot hole sizes here. The lag shield has a specified hole size required, which should be documented, such as this one. Share. ... answered Jan 10, 2013 at 21:39. Tim B Tim B. 2,440 16 16 silver badges 19 19 bronze badges. 2. ... agreed. To elaborate on my concern, lag shields are sized for a standard size lag screw. This hangar may not be close …Nov 7, 2022 · When it comes to choosing the right size pilot hole for your lag screw, there are a few things to keep in mind. First, the diameter of the screw dictates the size of the pilot hole. A 1/4″ diameter screw requires a 3/16″ pilot hole, for example. Second, the length of the screw also plays a role in determining the size of the pilot hole. Designed specifically for attaching track brackets and flag brackets of garage door assemblies to wooden door jambs. Material. AISI 1018 or equivalent steel. Tolerance on Length. +/- .012. AFT Fasteners provides a helpful resource on lag screws / lag bolt dimensions, applications, material, and hardness. Lag bolt sizes range from #10 to 7/8". It's possible to hang shelves without tools, screws, or scuffs. You might want to put up shelves but feel hesitant to do anything that could damage your walls. And even if you’re pretty handy with a putty knife, fixing screw and nail holes ...Feb 8, 2022 · The Monoprice TV Mount came with four lag screws that only labelled as W-A which I have no idea what it means. Measured the head width & height and google showed it to be likely 5/16 lag screws from one of the charts I found. For drilling a pilot hole, google search showed that for 5/16 lag bolts, a pilot hole needs to be either 7/32 or 3/16 ... For example, if you’re using screws that are 3/8” wide, you should use a pilot hole that is 5/32” in diameter. ... For instance, a wooden post usually requires a 5/16” or 3/8” lag screw, while metal posts require ¼” or 3/8” hex bolts. The size of the post, too, will greatly affect which size bolt you need.As its name implies, the latter provides clearance for the widest diameter of screw, or lag—in your case, 5/16 in. The clearance hole is drilled through the 2x and allows the fastener to spin freely to draw the …Jul 14, 2021 ... How To Drill Pilot Holes ... You will want to make the pilot hole for your lag screw slightly smaller than the diameter of the screw. A tight fit ...1. Principles. The function of the cortical lag screw is to compress one piece of bone against another. This improves the stability of a reduction, so it is commonly used to achieve absolute stability, leading to direct bone healing, as opposed to healing with callus. There are various screw types available, and details of the lag screw ...Lag Screw Pilot Hole Diameters. Pilot or lead holes are typically used to ease the installation of large diameter lag bolts. Unless specified, the lag bolts we make will have a semi-cone point, not a gimlet point typically supplied on smaller import product. Full points are not needed for large diameter lag bolts, because pilot holes should be ... 1. Principles. The function of the cortical lag screw is to compress one piece of bone against another. This improves the stability of a reduction, so it is commonly used to achieve absolute stability, leading to direct bone healing, as opposed to healing with callus. There are various screw types available, and details of the lag screw ...I am putting a punching bag up in my basement. I am using an everlast mounting bracket which allows me to use two bolts to fasten it. I have strong wooden joists in my basement, the house was built probably 30 years ago. I drilled two 7/32 in pilot holes, to accommodate two 5/16 in lag bolts, because I wanted it to be really tight.For a 5/16 lag screw, what size pilot hole do I need to drill? As a general rule of thumb, the pilot hole for a lag screw should be around 75% of the entire diameter of the screw you are using, if possible. That equates to about 7/32 in. for a 5/16-in. lag bolt.undercuts in the hole, bonding the screw to the wall and sealing the hole to prevent moisture from entering. Optimal holding values [measured in tons] ... 13105 A8 #8 – 5/16" lag No Screw 100 1000 5000 13107 A10 #10 – 3/8" lag No Screw 50 500 2500 41084 A10 #10 – 3/8" lag #14 x 2-1/4 4 40 800GRK Fasteners' RSS™ screws that measure 3-1/8" or longer feature a six threaded CEE thread, enlarging the screw hole for the non-threaded portion of the fastener, which then allows wood to settle more easily and increases the screw’s drawing strength.Table 2. Lag Screw Pilot Hole Sizes. Unthreaded body and threaded section pilot hole sizes, in inches, for soft, medium and hard wood. See a table of Species Groups for Sawn Lumber for a listing of species in each group. † 7/16" is not commonly available. Lag Screw Pilot Hole SizesMore than once in various topics I have admonished builders to use the correct size pilot hole when fastening with lag screws. Nobody's ever asked what the ...The folks at Jamestown Distributors (www.jamestowndistributors.com; 800-423-0030), who sell a wide variety of fasteners, told me that as a rule of thumb, the lead hole for a screw should be approximately 75% of the total diameter. For a 5/16-in. lag bolt, that works out to be about 7/32 in.A half-inch lag screw is way, way overkill and you unnecessarily compromise the joist - for no good reason. The pull-out value for a 5/16" lag screw in most lumber is something over 100 pounds per inch of thread. Increasing to 3/8" puts the value over 200 pounds per inch of thread. So, if you use even a 5/16" screw with two inches of thread in ... Lag screws/bolts are fastened by rotating the head, allowing the screws to solidly penetrate into the material it's installed in. Carriage Bolts, on the other hand, are fastened into the material with a nut. Lags are usually not used with a nut, so the proper technical term is lag screws rather than lag bolts.The pilot hole required depends on the density of wood being used. For a 1/4-inch lag bolt attached to softwood, the appropriate pilot hole size is 3/32 inch. Medium-density wood requires a 5/32-inch hole, and hardwood requires a 3/16-inch ...Aug 23, 2022 · In general, for a 3/8 lag bolt, use a 21/64 inches drill bit to make the pilot hole. Using the drill bit, you should get a 0.3281 inches pilot hole size. Check the detailed explanation and illustration below. What Size Drill Bit for a 3/8 Lag Bolt – Getting Started. To install a lag bolt, drill a pilot hole with a drill bit first. Lag screws can withstand significant stress over a long period of time; 3/16 in. pilot hole is recommended; Use with a 1/2 in. drive; Includes 25 lag screws to complete your building project; Knowing the correct types of fasteners will make your projects run more smoothly and be more secure. Return PolicyLag Screw Pilot Hole Diameters Guide for Construction. • Call or Text (951) 270-1360 • Email [email protected]. Pilot holes are typically used to ease the installation of lag bolts. Get your free downloadable …Nov 24, 2020 · The 3/16” diameter masonry screw requires the use of 5/32” carbide tipped bit for drilling the hole. The 1/4” diameter requires the use of a 3/16” carbide tipped bit. Length of Bit. The length of the bit used should allow the hole to be drilled a minimum of 1/2” deeper than the masonry screw will penetrate the base material. The chart ... Sep 6, 2016 ... So I drilled a 3/16" pilot hole for my 5/16 4" lag screw/bolt. The drill bit was the standard 3 1/2" long, but I have read that the pilot ...What size pilot hole should I drill for a 5/16 lag screw? What size drill bit is used for a #8 screw? The drill bit size you will require for a number 8 screw depends on the type of wood you are going to use. Some wood when drilled creates a bigger hole than normal. Some wood requires a bigger drill bit to pilot a hole for the screw.The head of the screw closes the hole off with precision, leaving no damaged fibres around the head. R4™ screws 2" and longer have a four threaded CEE Thread. This enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily. It increases the screw’s drawing strength and reducesExample 1. Application of TR12 to lag screw connections Problem Statement: Determine the reference design value for a single shear lag screw connection between sawn lumber members. Compare values for connection conditions described in Cases A, B, and C. Given: Lag screw diameter (NDS Appendix L): D = 0.375 in., D r = 0.265 in.What size pilot hole should I drill for a 5/16 lag screw? What size drill bit is used for a #8 screw? The drill bit size you will require for a number 8 screw depends on the type of wood you are going to use. Some wood when drilled creates a bigger hole than normal. Some wood requires a bigger drill bit to pilot a hole for the screw.Drill a pilot hole, unless the screw can go in without one. ... You’ll need a 1/4-in. hex driver for the 3/16-in. screws and a 5/16-in. driver for the thicker 1/4-in. screws. ... tools and fasteners. Most people mess up thinking they can use plastic anchors. Uh, no. At the least you should use a lag shield.The 7/32-inch drill bit is the best fit for creating a pilot hole for a 5/16 lag screw in softwood. Hole Sizes for Different Drill Bits Here is a chart that will come in handy while drilling a pilot hole for lag bolts.Bolt Size Pilot Hole Size 1/4 1/4 5/32 5/16 5/16 3/16 3/8 3/8 15/64 Bolt Size Pilot Hole Size 1/4 1/4 5/32 5/16 5/16 3/16 3/8 3/8 15/64 Also ... Unlike normal wood screws, which thread as they penetrate the wood, lag screws need a hole to be drilled before they can be used.The lag shield has a specified hole size required, which should be documented, such as this one. Share. ... answered Jan 10, 2013 at 21:39. Tim B Tim B. 2,440 16 16 silver badges 19 19 bronze badges. 2. ... agreed. To elaborate on my concern, lag shields are sized for a standard size lag screw. This hangar may not be close …Lag screws can withstand significant stress over a long period of time; A 15/64 in. pilot hole is recommended; Use with a 9/16 in. drive; Includes 25 lag screws to complete your building project; Knowing the correct types of fasteners will make your projects run more smoothly and be more secure. Return Policy Pilot holes provide a guide for the screw and make it easier to screw into the surface without cracking or splitting the surrounding material. The pilot hole should be about one-quarter to one-half of the screw’s diameter. If the pilot hole is too shallow, the screw won’t be able to deeply penetrate the surface and could cause damage or break.Jun 10, 2010 · Drill a hole into the material that is smaller than the diameter of the lag screw. The smaller the pilot hole, the more effective the lag screw will be. You also do not have to go very deep. A good rule is to drill your pilot hole a third of the length of the screw. 2. Measure. When working with any material, you should never use lag screws ... For example, if using a 3/8” lag screw, the pilot hole should be 11/32”. If using a larger lag bolt, such as a 1/2” lag bolt, then the pilot hole should be 17/32”. When drilling the pilot hole, ... The size of the pilot hole for the 3/8 lag bolt should be 5/16 inch, which is 0. 312 inches in diameter.They are also known as lag screws or lag bolts but should not be confused with coach bolts or carriage bolts. ... Time required to drill pilot hole and screw in coach screw: Time required to drill hole, hammer through bolt, …Oct 17, 2017 · Installing a 5/16-in. screw with a battery-powered drill and no pilot hole is quite a claim. So I tested 5-in.-long screws from all three manufacturers (GRK, Spax and FastenMaster) to see if they really delivered. The GRK screw went in faster than the other two, but they all lived up to their billing. They really did zip right in. Lag Shield Information. Print this page . Size Hole Size Anchor Length; 1/4" Short: 1/2" 1" 1/4" LongFor a 3/8 lag bolt, use a 21/64 inch drill bit to make the pilot hole – you should get a 0.3281 inches pilot hole size. That’s very critical. If you use a smaller or larger drill bit to make the pilot hole, the lag bolt won’t fit snugly into the hole. You will have to re-drill another hole or switch the material.Sep 2, 2022 · A 5/16 inch lag bolt will require a pilot hole to be drilled that is slightly larger than 1/4 inch in diameter. The best way to determine the size of the drill bit needed is to carefully measure the specific lag bolt that will be used. Joint compound is used to fill in creases and joints between pieces of drywall. It can also be used to repair relatively large holes in a wall. In contrast, spackle is used to repair smaller holes caused by nails or screws.A half-inch lag screw is way, way overkill and you unnecessarily compromise the joist - for no good reason. The pull-out value for a 5/16" lag screw in most lumber is something over 100 pounds per inch of thread. Increasing to 3/8" puts the value over 200 pounds per inch of thread. So, if you use even a 5/16" screw with two inches of thread in ...When it comes to pilot holes, there is no one-size-fits-all answer. The correct size for your pilot hole depends on the diameter of your lag screw as well as the …The 7/32-inch drill bit is the best fit for creating a pilot hole for a 5/16 lag screw in softwood. Hole Sizes for Different Drill Bits Here is a chart that will come in handy while drilling a pilot hole for lag bolts.For a 3/8 lag bolt, use a 21/64 inch drill bit to make the pilot hole – you should get a 0.3281 inches pilot hole size. That’s very critical. If you use a smaller or larger drill bit to make the pilot hole, the lag bolt won’t fit snugly into the hole. You will have to re-drill another hole or switch the material.A lag screw also requires a clearance hole through the ledger (in the same size range as for a 1/2-inch-diameter bolt), plus a smaller pilot hole through the house rim joist and wall sheathing. The pilot hole should be the same diameter as the root of the screw portion of the lag, generally 5/16-inch diameter.Mar 18, 2015 · Pilot holes guarantee that your screw won’t break off and your wood won’t crack. For most hardwoods, the pilot hole should be at least as large as the screw’s minor diameter. If the screw has deep threads, or the wood is very hard, the pilot hole should be another 1/64-in. larger than the minor diameter. For softer woods, the pilot hole ... Pilot Hole Size for Softwood: Lag Screw Diameter: Pilot Hole Size for Hardwood: 3/32″ 1/4″ 3/16″ 9/64″ 5/16″ 7/32″ 11/64″ 3/8″ 1/4″ 1/4″ 1/2″ 11/32″ 5/16″ 5/8″ 1/2″ 3/8″ 3/4″ 9/16″While they are stronger than lag screws, they are also simpler to install since they do not need the drilling of a pilot hole before inserting the screw. For a 5/16 lag screw, what size pilot hole should I drill is a good question? In general, the pilot hole for a lag screw should be roughly 75% of the overall length and diameter of the screw ...The calculator will then generate the recommended size of pilot hole needed for your specific project. Drill Pilot Hole: Using the recommended size from the calculator, drill a pilot hole into the wood at the marked location. Make sure to drill straight and at the correct depth, as indicated by the length of the screw.For a ½” lag bolt, a 5/16” pilot hole should suffice. For 3/8” lag bolts, use a ¼” pilot hole. For ¼” lag bolts, use a 3/32” pilot hole. The pilot hole should be long enough to …Dowel screws are a headless fastener with a lag thread at both ends. Dowel screws are designed to be inserted into a predrilled pilot hole. The end of the wood thread is designed as a taper that is threaded all the way to its blunt tip. Dowel screws are used as wood to wood fasteners for joining two pieces of wood.When considering a 1/2-inch grade 8 bolt with 13 threads per inch and an effective stress-carrying cross section of 0.1419 square inches, the breaking load would be 0.1419 (area subjected to stress) x 150,000 (tensile strength) = 21,285 pounds (area subjected to stress x tensile strength). Answer If you use a single 1/4″ Grade 5 lag bolt in ...5: 15/16: 1 1/16: 27/64: 03/Apr: 0.75: 4 1/2: 1 1/8: 1 17/64: 01/Feb: Table 1. ... Lag Screw Pilot Hole Sizes. Unthreaded body and threaded section pilot hole sizes, in inches, for soft, medium and hard wood. See a table of Species Groups for Sawn Lumber for a listing of species in each group. † 7/16" is not commonly available.Jan 25, 2023 · The pilot hole should be well fitted to the screw or the nail so that it would not wobble when inserted. To achieve this, the right bit size should be used. It is recommended that you should spend ample time to read and understand the drill bit guide. The size of the still bit should be slightly smaller than the diameter of the nail. Pilot holes are small holes which are made on the materials before the screws or nails are driven into the mate, Drilling a pilot hole and need to know what drill bit size to use? ..., Also known as lag bolts, they have a hex head for a secure grip with a wrench. They press threads into material for a, Jan 23, 2020 · 1/2″. 3/4″. 5/8″. 7/8″. 3/4″. 1″. If you’re looking to fasten lag screws, Lag screws can withstand significant stress over a long perio, Light a standing pilot on a gas stove by holding a lit match near the gas outl, For example, if using a 3/8” lag screw, the pilot hole should be 11/32”. If using a large, The Strong-Drive SDWS Timber screw is designed to provi, One way to easily layout screws for keyhole slots on the, They come in numerous diameters, the most common being 1/4, 5, Below is the quick and easy chart for most situations. Lag Bolt Siz, Place the anchor in the pilot hole and tap it into the wa, What size pilot hole should I drill for a 5/16 lag s, Flat Working with Screws Use soap or wax to lubricate, Lag screw sÞecifications 5/16" shaft, * per inch thread , The calculator will then generate the recommended size of pilot hole n, Pilot Holes For Lag Bolts Lag bolts are nothing more than large w, Steven Wallenstein. Phone: 800.598.4204. Email: steven@p.