Bolt Thread Size Chart

Engineering Supplies. To learn more about anchor bolts, check out our blog on their types and uses. Thread size is one standard size smaller than the shoulder diameter and needn’t be specified, except for: A screw with a 1/2″ diameter shoulder has a 3/8 – 16 thread. Metric Bolts. UNS threads are listed in Table 14 labeled "Standard Series and Selected Combinations". This means it's a #6 diameter, with 32 threads per inch (almost double the normal thread count as a standard wood screw) and an inch and a half long. What is the actual Size of the M6 Bolt? Does the M6 Bolt Size mean that the allen key size for the bolt is 6mm or that the thread size of the is 6mm. This chart below is designed to help you get the proper set-up for using a countersink and match it with either a Taper Point bit or a Straight bit. When we calcuate a bolt length it's no more than 2xD and no less than 1-1/2xD. Measure the outside diameter of the bolt threads using a vernier caliper. Features • • Sold•in•Individual•Sets•or•Box•Quantities. If “LH” is added, the pipe has a left hand thread. Larger root radius and lower thread height enable easy screw thread processing and increase thread screw strength. Nominal Size Range (in. Figure 2 illustrates two possibilities for the applied shear load. ANSI/ASME B1. Why Choose US for Metric Nuts and Bolts. values in threads per inch. 724-444-6940. For example, a 6-32-2a thread has a major diameter tolerance of. The root diameter on some wood screws tapers along the length of the threads. Also the Minor Diameter and Tensile Stress areas. 0005 a notes: this thread guide is for full sized (not compact) 9mm and. British Association Standard Screw Threads are used mainly for instruments and clocks. The pitch, depth and shape of the threads will always be different and even the diamater is not exactly the same - close enough for the purposes of a wrench, not close enough for much else. The trusted name in laboratory supplies for 36 years. 060 detail a scale 6 : 1 0. Check out the bolt pattern chart (PCD) for F-150 of all years as well as other wheel specs like thread size, offset and center bore. Find the light bulb base type you’re looking for with this visual chart- detailed illustrations of general bases, fluorescent bases and specialty halogen base types. Thread count is also known as thread pitch or threads per inch (TPI) and is used to determine how fine the threads on a screw are. and metric sizes. The only other Bolt i know of, which is fine Thread is the long right Side rear M10 Engine Bolt on 1Gen Vmax. AN bolt sizes translate directly to bolt OD in sixteenths of an inch. Unified national thread rate chart. Eagle Fastener Corporation's fine thread size table is a quick guide to national fine thread sizes. If the hole is too large, the tap will cut with little problem, but the internal thread will not be the correct size for the bolt/screw, and failure during tightening or use is very likely. * Shank diameter is measured on the smooth portion of the screw above the threads. 724-444-6940. Where: H = P ( 3 1/2 / 2 ) = 0. 5 + 1 mm, but as Captain Leaky said, not always. While a ruler could be used to calculate the pitch size, a pitch gauge is highly recommended as pitch sizes can be very similar. Actually, there are standards that can be looked up in things like Machinery's Handbook, but many auto manufacturers do use custom hardware for special applications. 5 screw is 2. US and METRIC STEEL BOLT GRADES METRIC THREAD SIZES Thread Size* Tap Drill Size** Metric Tap and Drill Chart Created Date:. 5 thread is tapped thru 9. Teflon and pipe dope are commonly used when additional sealing is needed. HeliCoil Part Numbers - Screw Thread Inserts. Filters 40. 7854 x [d - (0. Taps can also be used to restore an internal thread that has been damaged or to cut a new, larger thread in the case of severe damage or. 1 PRELUDE, V-TECH 97-01 5X114. com Disclaimer: We know learning about the potential biomaterials can inspire a wealth of ideas and we love your creativity. If all else fails, you may want to use our Drill Size Conversion Table or our Tap Drill Size Calculator. 405" 1/4" 0. Valve Covers (Pre 82) 1/2-20 x 3/4" 8 3. All sizes are in inches. The BA-series screw threads should not be used for new designs. American inch-based screw thread series, used in bolts, machine screws, threaded holes in castings, and so forth. Most fastener machine screws thread forms are incomplete thread types. 563-18 thread is listed as UNEF (extra fine) not UNS. (ref) mm in. Machine Screw Size: Threads Per Inch: Minor Dia: Tap Drills: Clearance Hole Drills: Alum, Brass, & Plasitcs. Hole Sizes) 1-24 Thumb and Wing Screws 1-25 to 1-27 B7 Studs and Nuts Stud Bolts for Pressure-Temperature Piping 2-1 General Purpose End-to-End Studs 2-2 Tap End Stud Bolts 2-3 Double End Stud Bolts 2-4 Bolts Hex Cap Screws (Finished Hex Bolts) 3-1 Wrench Openings for Square and Hex Bolts and Screws 3-2 to 3-3. A trilobular thread forming screw with a machine screw’s thread pitch. 50 pitch thread. The following chart cites other examples which illustrate the potential danger of mixing an inch with a metric fastener. PIPING PRODUCTS. Core Dia Female. B7 STUD BOLT WITH GRADE 2H. Screw-Thread. Slotted Flat Head Cap Screws. Too large a thread size will cause fasteners to loosen and come apart. Bolt patterns with an even number of lugs are measured from bolt center to bolt center while 5 lug bolt patterns are measured from the top of the upper lug to the center of the lower lug. Re: Drill size to tap and use a 5/8\" bolt Most charts say 1/32" smaller. U-Bolt-It threaded rods are available in standard thread sizes and widely used in manufacturing, construction, fabrication, agriculture. As with BSW and BSF, the use of BSCy had declined rapidly by the 1970's. The thread pitch on the M6 is 1. Mettler Embroidery embroidery thread chart; Mettler Poly Sheen embroidery thread chart; Princess embroidery thread chart; Radiant Rayon embroidery thread chart; Robison-Anton Polyester embroidery thread chart; Robison-Anton Rayon embroidery thread chart; Royal Polyester embroidery thread chart; Royal Viscose Rayon embroidery thread chart; Sulky. Removal Information Jergens Keylocking Inserts can be removed without damage to the parent material. So be sure that the hex bolt is clean before you insert the allen wrench and that you've inserted it with all six sides properly aligned. For example a size of 12x1. ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. I ran into this Fastener Type Chart created by. 10-32 threads are historically the original rack screw type. US Threads Per Inch Table. A reducer allows you to reduce the size of a female thread. and smaller, and Unified inch 8 thread series (8 UN), Class 2A, for all stud bolts larger than 1 in. Tap Drill & Thread Height Chart This chart displays a variety of UN Thread sizes, their likely Tap Drills and the resulting Theoretical Thread Height Percentage. Pipe thread sizes do not refer to any physical dimension. The chart below will help you select the correct screw length for your next project. The number “10” is simply a size designator with no numerical meaning. We are exhibiting at Mandalay Bay at Las Vegas Fastener Expo booth #1440. Bolts and Screws: Conversion from Fractions of an Inch to Millimeters. Totally new to crossbows and i am trying to learn as much as i can. Coarse pitch threads are preferred and should be used whenever possible, as stated in ASME B1. The Bolt Depot has some excellent charts that you can print off for both imperial and metric fasteners, as well as nuts and washers. UK Screw Sizes - Imperial vs. Stud bolts covered by the ASTM A193 or A320 Specifications use 8UN for all diameters 1” and above, which means that there are 8 threads per inch for these sizes. Unified Screw Threads per. Diameters: 2-56 to 2. T his chart lists the actual dimensions of wood screws and the closest fractional size equivalents. Whitworth tools can be difficult to identify. 3M-1992 (R2001). Proper torque spec varies depending on the material, bolt grade or wether lubrication is used such as oil, wax, or anti-seize Always go to the manufacturer for proper torque specs if needed. The second table provides the number of threads per inch for coarse (UNC) and fine (UNF) threads for various size screws and bolts. Number of Threads per inch is rounded to the nearest whole number; this is especially noticeable in the larger sizes. A trilobular thread forming screw with a machine screw’s thread pitch. AK pistol grip screw thread size If this is your first visit, be sure to check out the FAQ by clicking the link above. The catch is that the 1. Order Your Metric Bolts Today Bel-Metric has metric hex bolts, class 10. Locate the bolt diameter and grip length (total thickness) in the table to find the required dash size. The fine thread series must have both diameter and pitch called out, as MS x 0. A bolt pattern of 4x100 indicates a 4 bolt pattern on a circle with a diameter of 100mm. * For copper, aluminum, cast iron, bakelite, or very thin materials, use one drill size larger (i. Flywheel flexplate 7/16-20 x 11/16" (3/4") ? Timing Cover 1/4-20 x 1/2" 10 7. 086 #3 DIA = 0. unf bolt thread size chart Note: US diameters under 14 are given as numbers. 67 5/8 ADM 0. 1/2" AF (across flats) - 5/16" dia, Please only order by specifying thread diameter. Working With Wood Screws - Common Sense Tips Use soap or wax to lubricate screws in hardwoods. Screw size is determined by gauge and length. Locate the bolt diameter and grip length (total thickness) in the table to find the required dash size. Blade size. 073 #2 DIA = 0. These are the basics to know when looking at screw sizes but to find out more about the thread of screws and other items you can look at Wikipedia. 5 times the nominal diameter and having threads free of interference. Each number or diameter of screw size has its own Close Fit or Free Fit, independent of threads per inch. Have you ever wondered what the letters in thread sizes stood for? Or why some threads are sized differently? The thread size tells you the thickness of a thread. Tks Denny Graham Sandwich, IL. The first number is the diameter of the screw/bolt in inches and the second is the number of threads per inch. #0 DIA = 0. This is a rough guideline, if specific thread lengths are required then please contact us to check before ordering. If you have trouble learning thread crochet, start with these large sizes of thread. The decimal equivalents of the diameters are shown in both English and Metric units. 5 - Chart above as noted in ICBO AC 46 acceptance criteria SCREW SIZE Normal Size Basic Screw Diameter Actual Size 0 0. com Disclaimer: We know learning about the potential biomaterials can inspire a wealth of ideas and we love your creativity. threads (inches) Basic minor dia of int. Your Opinion. Screw and Tap Drill sizes. ISO general purpose metric screw threads -- Tolerances -- Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing. Come see us at the International Fastener Expo in Las Vegas, September 17 - 19, 2019. Basic major diameter Minor diameter Basic pitch diameter. Tap size: NF/NC UNF/UNC: Threads per inch: Basic major dia (inches) Basic effective dia (inches) Basic minor dia of ext. If the lug nut or bolt appears obstructed or does…. Machinery, Inc. METRIC THREAD - Drill & Tap Chart Coarse Thread Sizes. ) Hex Key Sizes (in. Understanding Standard Size Dimensions. The thread size measures the thread’s thickness. Tightens In Pure Tension. To Determine the Size of a Bolt First measure the diameter. In this article, I have covered Flange Bolt Chart and Flange Stud Size. Lay your fitting over the appropriate drawing to determine what size fitting you have. Flywheel flexplate 7/16-20 x 11/16" (3/4") ? Timing Cover 1/4-20 x 1/2" 10 7. 052) #50 (0. Threads per inch range from 28 threads for a 1/4-in. Product Name Size Name Size (mm) Minimum Bead Hole Size (mm) Number of Passes through Seed Bead Size: 1. Thredfloer Taps. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Fine-thread bolts are typically a little stronger and yield a higher clamping force than their coarse thread brothers, but this comes at a cost, namely in galling and fouling of the threads. The bolt grip length charts linked below are especially handy when replacing non-AN bolts. Teflon and pipe dope are commonly used when additional sealing is needed. The Nut and Screw Grabber doubles as a screw starter! Placing a screw in the self-closing jaws makes it easy to thread even the smallest screw into the hardest to reach place. com provides an excellent overview on pipe thread sizing. Most fastener machine screws thread forms are incomplete thread types. They're comparable to Grade 8 steel. This term stands for 'British Standard Pipe' although it is used as an international measure throughout the world. Each AN size number has its own standard thread size [see column three of the chart]. Bolt Thread Sizes. This screw will thread into a nut or threaded hole. threads deformation. 8 f - 588 class 8. Soft drink bottle top thread sizes (08/05/12) The thread spec is available here (PDF file). The second number of a UTS bolt designates the threads per inch (TPI). 23 Section 6 Appendix 12/21/01 RCR15 Series Rotary Cutters 312-556M Land Pride Section 6 Appendix Torque Values Chart for Common Bolt Sizes in-tpi1 N · m2 ft-lb3 N · m ft-lb N · m ft-lb mm x pitch4 N · m ft-lb N · m ft-lb N · m ft-lb. The tool has different sized bushings that allow for a perfect line up to the broken bolt that needs to be removed. So, after reading the above paragraph, you should know that: 2-56 UNF 2A means it is a #2 thread (sometimes called also 0. When installing in steel, thread engagement should be 1-1/2 times the thread diameter. 11320 FM 529 RD BLDG F HOUSTON, TEXAS 77041 TEL (713) 896- 1166 FAX (713) 896-7879 Tool Size Chart Inch Fasteners Metric Fasteners Wrench Sizes (in. This takes all the guesswork out of drill sizes. Dorman has a vast array of Wheel Hardware from Wheel Lug Nuts, Wheel Lugs / Bolts and Oil Drain Plugs to meet your hardware needs. They run O to 6, then 8, 10, 12 and 14. Thread Repair kit sizes below will repair that bolt size. 25 pitch bolt will have finer threads than 1. - diameter bolt to 4 threads for a 4-in. A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter for external thread and the minimum diameter for internal one) and the pitch P, both expressed in millimetres and separated by the hyphen sign, -(e. The measurements are in decimals and millimeters. Thredfloer Taps; Thredshaver Taps; Carbide Inserted Taps; Thread Gages; Tapping Oil; Catalog. 5 in diameter and smaller are generally M. Sizes Pipe thread sizes are based on an inside diameter (ID) or flow size. Each AN size number has its own standard thread size. Bolt Thread Sizes. On the other Hand they have a Faible for M10x1. Numerical tabulation of sizes, major,minor, and pitch diameters. Tool Holders - EASY CHANGE Metric Tap Drill Sizes. You can easily identify your thread size and pitch with a simple thread pitch gauge available at any hardware store, or you can simply take one of your lug nuts to your local hardware store and spin it onto the bolts they have on hand. For standard metric sizes the general rule is that the measurement of the nut (or bolt head) across flats (i. Thread size has no direct relation to head size. Oil Pan 1/4-20 x 1/2" 14 4. Standard Series Limits of Size­Unified and American Screw Threads. Socket Head Cap Screw Size Chart. ASM provides fastener specifications & SAE dimensions including tolerances, thread dimensions, machine screw specs, tap sizes, & length tolerances. You may have to register before you can post: click the register link above to proceed. DANSMC BOLT TORQUE GUIDE Metric Bolts Maximum Torque, in foot-pounds, for clean, dry threads Check your Shop Manual! Bolt size Low Grade. Come see us at the International Fastener Expo in Las Vegas, September 17 - 19, 2019. 00180 No 1 72 2B 0. R&N Distributors may sign in to purchase online. Most fasteners are sized using two sets of number, the diameter and the thread count or pitch. , AN4 bolts / 6AN hose). THREAD/SCREW - Drill & Tap Chart. -diameter bolt. These torque values assume undamaged bolts, clean conditions and smooth bearing surfaces with generous lubrication of threads and bearing faces on nuts. These thread sizes and classes represent bolts and screws, as well, as other standard internal threads. 662-32 Thread that the Flange threads onto _____. Designation Size Decimal TPI Tol. 50" Same if they are "nut and bolt". The below chart refers to usage in steel. A trilobular thread forming screw with a machine screw’s thread pitch. This is the same value as Class 3A. ANSI/ASME B1. The Major diameter of external thread and pitch are specified by a simple numerical value (most commonly measured in millimeters). Stainless Steel & Nylon Parts: M2. Typically, tap drills are selected to result in a 60% - 75% thread height. Tap size: NF/NC UNF/UNC: Threads per inch: Basic major dia (inches) Basic effective dia (inches) Basic minor dia of ext. For example a 1/4W wrench is the same size as a 5/16BS (British Standard) wrench, and it is. minus One Pitch Length equals tap-drill size. Determine the maximum torque according to bolt (nut) size and grade. -diameter bolt. T his chart lists the actual dimensions of wood screws and the closest fractional size equivalents. Then use the correct size drill bit to drill down the exact center of the bolt. Understanding BSP Thread Sizes. Another M5 screw. This tap and clearance drill chart shows tap and clearance drill sizes for standard threads. The U-bolt size is given as Diameter (A) x Distance Between Legs (B) x Leg Length (C). These products are included in the previous tables in this section. I have volume 1, and 2 and he covers screw size and pitch pretty well, Otherwise you might take the screw to a good hardware store that has a screw checker. UNS threads are listed in Table 14 labeled "Standard Series and Selected Combinations". To Determine the Size of a Bolt First measure the diameter. Unified Screw Threads per. Good guess would be 6-48 but you need to check to verify. Use the Mudge Fasteners bolt head size chart to determine the head size, and wrench or socket size required, for any hex bolt or lag screw you use. For Example: If we had a Male 1/2 NPT Pipe and we have a socket with a Female 1/4-18 IPS we can use the NE457 along with a 1/4-18 IPS Nipple. Thread Dimensions. 082) M3 x 0. You may have to register before you can post: click the register link above to proceed. 033 x (pitch) for all pitches. Do not use these values for standard metric internal thread design. This series is used for diameters one inch and above. If your tool box is like mine, you have an assortment of wrenches, but invariably need a second one for the same bolt and don't have the extra standard or metric one of the same size. THREAD/SCREW - Drill & Tap Chart. There are nineteen standard sizes - known as the 'preferred ' sizes and ten less commonly used (the so-called 'non-preferred') sizes. Size Length Hook Thread Length 3/8 6 1 1/2 3/8 8 1 […]. Sometimes other sizes are available. Thread identification chart (American Standard) This table contains information on threads per inch for American standard fasteners. U-Bolt-It threaded rods are available in standard thread sizes and widely used in manufacturing, construction, fabrication, agriculture. Eagle specializes in hard to find fasteners and components. Forming Tap Tapping Accessories Thread Drill Size Chart. The thread exposure can be adjusted either by using an extra washer or by going to the next size bolt length, either 1/8" longer or shorter. Size Length Hook Thread Length 3/8 6 1 1/2 3/8 8 1 […]. a For Class 2A threads with coating (plating) the max. Full-size triples usually use 110 mm/74 mm, or 130 mm/74 mm for newer "road triples. Using a 2 1/2" screw will not engage the framing enough UNLESS you countersink it 1" into the decking. and the 1/2 x 28 will be too thin at the threaded section and the 7/16 x 28 will leave the walls of the. UNF (fine thread pitch) has more threads per inch than the same diameter bolt in the UNC (coarse thread pitch). To help differentiate between the two systems, convention has put the "AN" before the bolt size but after the plumbing size (e. Unified National Coarse thread rate chart. TAP: Place tap into tap wrench or use the square drive in the installation tool if provided. Unified National Extra Fine. P/N 04-05400 POCKET BOLT GAUGE This new aluminum gauge measures just 3-3/4" x 5-7/8" to fit eas i ly in a shirt pocket. , an M8 bolt has an 8mm outside diameter, and then measure the pitch by measuring the distance between threads. Metric/Imperial Screw Conversion Chart Gauge mm Length mm Imperial Size Gauge mm Length mm Imperial Size 3 12 4 x 1/2 3. Outside diameter is 27. After printing, measure the ruler in the margin to ensure correct scale. Proof load, stress area, yield strength, and other data is based on IFI 7th Edition (2003) Technical Data N-68, SAE J429, ASTM A307, A325, A354, A449, and A490. metric screw threads ISO 724 (DIN 13 T1) Nominal diameter d = D: Pitch P: root radius r: pitch diameter d2=D2: minor diameter d3 D1: thread height h3 H1. This series is used for diameters one inch and above. The size most commonly associated with screw threads is the nominal diameter. For example a size of 12x1. British Standard Pipe(BSPP, BSPF) Thread Form r = Basic Radius = * 137329 p h = Basic Depth of Thread = *640327 p p = Pitch = 1/t. The fine-thread series (UNRF or UNF) is found mostly in automotive and aeronautical work. Thanks, Just what i was looking for. 5 times the nominal diameter and having threads free of interference. Basic major diameter Minor diameter Basic pitch diameter. threads (inches). 8 f - 568 class 10. If "LH" is added, the pipe has a left hand thread. Hardware Sizes: Metric Screw Thread. What size bolt is used on a car's battery terminal? I've tried a 3/8 and a 7/16 socket wrench, but both are not the right size. The chart below will help you select the correct screw length for your next project. Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries. Detailed screw sizes charts. 5781 37/64 37/64 3/8 - 18 NPT. Acme Screw Thread Form Terms Thread Types. Tap size: NF/NC UNF/UNC: Threads per inch: Basic major dia (inches) Basic effective dia (inches) Basic minor dia of ext. Each has a standard UNC/UNF thread specification. Unified National Course. 4 MM in length. Standard hole sizes for bolts are made 1/16-in. Countersink Drill Size Chart. The bolt thread shear area per inch, AS s: 1. TECHNICAL INFORMATION Metric Thread Pitch Table Metric Pitch Table Metric Diameter Pitch mm Coarse Standard Fine Standard 3mm 0. 055 has a decimal size of 0. 1pc and 2pc have the same thread size - but the bolt head is different Torque converter bolts are very short - if you have a converter that they thread into they are proably 3/8-16 x. A bolt pattern of 4x100 indicates a 4 bolt pattern on a circle with a diameter of 100mm. Hex Head Bolt Dimensions ASME B18. * Make-up torque for "black" or "plated" B7/L7 bolts and 2H nuts using API BUL 5A3 / ISO 13678 thread compound. Core Dia Female. (ref) mm in. Thread Depth. TIMESERT ® PROFESSIONAL THREAD REPAIR KITS METRIC SIZES. For any other material grade, the buyer shall specify the thread pitch unless it is given by the applicable ASTM norm. Standard Thread Length for Bolts | Inch / Imperial Bolt Diameter 6. an instruments or accessory to a panel: 0­80 NF, 2­56 NC, 4­40 NC, 8­32 NC, 10­24 NC, and 10­32 NF, with 10­32 preferred over 10­24. The torque chart is for reference only and assumes properly lubricated ASTM A193 B7 stud bolts with ASTM A194 2H steel nuts. A490 bolts and galvanized A325 bolts shall not be reused. Important - For the flywheel, flexplate, torque convertor, head, main journal and especially the rod bolts, use bolts specially made for this application! Do NOT use bolts purchased at bolt supply houses or hardware stores. The following is Machinist Metric ISO Screw Thread Tap - Drill Size Chart for Metric Course and Fine thread sizes. The second number of a UTS bolt designates the threads per inch (TPI). View Our Product Specs and Buy Online. Tapered and parallel threads are explained. This is because there are so many variations in bolt sizes. Metric Stud Bolt to Nut Chart Dimensional data: metric stud bolt to nut table will help determine the correct size bolt or nut for your purpose. T his chart lists the actual dimensions of wood screws and the closest fractional size equivalents. 75x30 translates to a bolt that is 12mm in diameter, has a distance of 1. 1 PRELUDE, V-TECH 97-01 5X114. Countersink Drill Size Chart. mild steel countersunk square neck bolts (plough bolts) : din 605 diameter mild steel countersunk nib bolts: din 604 diameter 5. Thanks, Just what i was looking for. Consider this size…. Free Bolt Size Charts - Screw Charts - Nut Size Charts - All Charts are downloadable and printable pdf formats - Great Online Mechanics Tools for Metric and US Bolt, Nut and Screw Charts There comes a time when every mechanic could use a quicker way to help measure their Nuts and Bolts. 3 f - 568 class 9. Removing the Hi-Nuts from the U-Bolt will cause a cross-threading that will not allow the U-Bolt to be adequately re-torqued. 086 #3 DIA = 0. If so, be assured the Bolt is a special Shape and can't be replaced with a standard shape metric Bolt easily. 1 PRELUDE, V-TECH 97-01 5X114. Sewing Thread Sizes Explained. - Thread size from 0. Here is a list of common thread pitches in my store: Pitch means how fine or coarse the actual threads are. Steel Bolts - SAE Grades - SAE steel bolts - grades ranging grade 1 to 8. …to verify that you have matching lug or bolt thread sizes, first install the lug nuts or bolts without the wheel. 0600 inch to 2 inches Calculations can be done by selecting a desired thread size from a list of thread sizes which are in the diameter range from 0. Guaranteed lowest price!. Re: Screw thread engagement You just got several really good suggestions from pros and I will add to that. The first number references to the major diameter of the screw (major diameter is the outside diameter of the screw measuring on the outside of the threads, minor diameter is the smaller shank diameter, measuring between the threads).