Fine thread bolt chart 870 22 or isit us at southernastenerscom Thread Pitches Pipe Thread Nominal Dia (in. H1 Tap Drill Diameter mm; 1. 9 12. Jul 16, 2021 · Metric Bolt Thread Size: Thread sizes for coarse and fine pitch thread were created using the standard sizes from ASME B1. ISO Metric Threads Charts; Unified (Inch) Threads Charts; National Pipe Threads (NPT) Dryseal Pipe Threads (NPTF) British Pipe Threads (BSP) ACME Trapezoidal Threads; Whitwoth Threads (BSW/BSF) Materials Menu Toggle. The charts below gives the dimensions for Metric Coarse Thread and Metric Fine Threads. The minimum length of complete thread is one-third of the basic major diameter plus 5 threads %PDF-1. Coarse Thread Table. 75mm pitch, while an M12x1. It was one of the first topics standardized by the ISO committee as early as 1947 and is still used today. Coarse Thread/ inch. 3M-1992 (R2001). 9 8. SAE Grade 3 100,000 psi Med Carbon Steel. ) n = Thread Pitch (Threads Per Inch) UNF - Unified National Fine UNEF - Unified National Extra Fine UNM - Unified National Miniature * - ISO Standard-1st Choice ** - ISO Standard-2nd Choice *** - ISO Standard-3rd Choice X - DIN (German Standard Basic Major Diameter US Standard Metric Inch mm Nominal Diameter mm Thread Per Inch (TPI) Nominal Diameter mm Standards Pitch in mm British Standard Fine (BSF) British Standard Fine (BSF) is a screw thread form, as a fine-pitch alternative to British Standard Whitworth (BSW) thread. ) is generally specified as diameter, pitch and length, all in millimeters (mm). Section @ Minor Dia. CAUTION There are many varying factors which affect torque. Take, for example, a 3/8-16 (coarse) thread. Basic Pitch Dia. The following chart contains ISO, ANSI, MIL, BS, DIN, JIS standard designations and references for threads. DIN 960 / ISO 8765 Partially Threaded Hex Cap Screw (Fine Thread) 8. Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Tensile Stress Area Nominal Size and Threads Per In. US Hex Bolt Sizes and Thread Pitches (continued) mm 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 US-size-chart-hex THREAD DATA CHART: Metric Thread -- Fine Pitch: Nominal Size ISO MF: Thread Form Type: Major Diameter mm d=D: Pitch mm p: Root Radius mm r: Pitch Diameter mm d2=D2: Minor Inches Conversion Chart: Screw Thread Tables. The UNF series consists of thread specifications with a finer pitch compared to the UNC series, which generally provides a better tension and strength relationship. Clamp loads for Grade C lock . Refer to the charts to find the ideal tightening torque. How to Read and Use the Bolt Torque Chart. Fine Thread Series (UNF/UNRF) is commonly used in precision applications. www. D1 Thread Height Male Thd. 047 4 23 0. which rounds up to 15 ft. 20: 0. 75mm 11320 FM 529 RD BLDG F HOUSTON, TEXAS 77041 TEL (713) 896- 1166 FAX (713) 896- 7879 Thread Chart Threads Per Inch (TPI) Feb 23, 2024 · The UNF thread chart referenced on the Engineering Toolbox page lists the specifications for Unified National Fine (UNF) threads, which follow the ANSI/ASME B1. Bolt Size Inches. 8 Grade Bare/Zinc (1st Feb 2, 2021 · For instance, when a screw or bolt measures 5. 100: 19500 example, the nut threads will shear out the bolt threads. 755: 0. Home; Products; DIN 960 / ISO 8765 Partially Threaded Hex Cap Screw (Fine Thread) 8. Both DIN and ISO standards for metric threads ignore the pitch callout on coarse threads. If you fully coat the threads with engine oil, the lubricated torque value is 14. Thread Chart, British Standard, BSW, BSF. This section contains tables of sizes for metric thread hardware. 1 standards. For example, in the screw size 10-24, the first digit refers to the thread diameter, the and second digit is threads-per-inch (TPI). h3 Thread Height Female Thd. 1. This fine thread, which is widespread in the British machine tool industry, is superseded by the American UNF Thread. 870: 0. Bolt Thread Pitch Understanding bolt thread sizes, specifically UNC (Unified National Coarse) and UNF (Unified National Fine), requires delving into the distinctions between threads per inch (TPI) and thread pitch. 7854 x [d - (0. Most of us are more familiar with standard measurements. govern lock nuts . For example, a thread diameter defined as "M12" indicates a coarse pitch (M12-1. Tensile Stress Area Nominal Size & Threads Per In. However, fine thread applications require a longer engagement than coarse thread applications to ensure stripping does not occur. The specified thread forming method for several ASTM standards is 8 – Thread Series (8UN). 01083 0. 8 10. 9mm, it is called a 6mm thread. Bolt Thread Tensile Stress Area. com . UNF – Unified National Fine Thread; Female and Male UNC/UNF threads are both parallel; The UNC/UNF flank angle is 60° Unified threads comes in three different classes: for applications where a liberal tolerance is required to permit easy assembly even with slightly nicked threads; most commonly used class for general applications Fine thread fasteners have higher tension strength due to the larger tensile stress areas. – Unified Fine (UNF): these threads have a smaller pitch than UNC threads and are used for applications where greater tensile strength is required. Coarse pitch threads are preferred and should be used whenever possible, as stated in ASME B1. 8 Grade Bare/Zinc (1st Fine) SAE bolt grades indicate the strength of the bolt. The values shown in the chart are to be used as a mid-range guideline. FINE PITCH (BSF) BRITISH THREAD DATA CHART Whitworth Fine Thread BS 84 British Standard Fine Thread Series (parallel, cylindrical) BSW and BSF are the Thread selections for commercial screws and nuts. a bolt or screw assembled with a nut of the nominal diameter - fine thread m 14x 1. Machinability Chart; Material Standards Conversion; Material Groups (VDI 3323 Fine Thread Sizes National Fine Thread Sizes (UNF/UNRF) Measured in Inches Nominal Size Major Diameter Threads/inch Basic Pitch Diameter Minor Diameter Lead Angle at Basic Pitch Diameter Height of Fundamental Triangle Tensile Stress Area (Degrees) (Min) (square inches) #0 0. 783 For example, an M12x1. Threads Charts Menu Toggle. Created Date: 9/8/2006 11:12:23 AM It is essentially the largest diameter of a screw thread. 060 80 0. Below are the recommended torque specifications for our fine thread u-bolts. Thread sizes in inches are specified by diameter and threads per inch. Ph: 713-462-3147 . Gessner Houston, TX 77040-4015 . Jul 2, 2015 · Coarse Thread Series – UNC Fine Thread Series – UNF 8-Thread Series – 8UN Nominal Size and Threads Per In. In this scenario, the bolt threads will shear out the nut threads. 1-1989 (R2001), R2001) Nomenclature, are used. Fine Threads for Thin-Wall Tubing: Dimensions for a 27-thread series, ranging from 1⁄4-to 1-inch nominal size, also are included in Table 3. Each bolt grade has an ideal tightening torque for maximum clamping force without breaking. This information is critical for selecting the right torque values. In the List you find the metric fine torque unit in Nm and ft lbs. Thread Chart, American Standard, UNC, UNF. In this nominal diameter major diameter pitch (in) pitch (mm) tap drill size (inch) major diameter (mm) tpi #0 #1 #2 #3 #4 #5 #6 #8 #10 #12 1⁄4 5⁄16 3⁄8 7⁄16 1⁄2 The following table shows the tightening torque for metric fine thread fasteners. . All units are in inches. d3: Minor Diameter Female Thd. The bolt material is stronger than the nut material. 50 (fine) thread has a 1. 313” 1/ 16” 27 0. The failure will occur at the root of the bolt threads. TPI serves as the measurement for bolts and other fasteners under the imperial measuring system, determined by the number of threads per inch. ANSI/ASME B1. 50mm pitch. Metric - Coarse and Fine Thread Pitch Chart Diameter DIMENSIONSOFSTANDAKDSCREWTHREADS 5 Table15. 029: 0. Menu. Unified Inch Screw Thread, Fine-Pitch Series, with Feb 18, 2023 · UNC threads have a 60-degree thread angle and a flat crest and root. ** Torque values + Coarse threads are much less likely to experience thread galling than fine threads. Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in adverse conditions and facilitate quick assembly. SAE Grade 5 120,000 psi Med. IFI-100 does not . On the other hand, a 3/8-24 (fine) thread, while having the same nominal major diameter, offers 24 threads per inch, providing a finer, more closely packed threading. UNFThreadChart(UnifiedInchScrewFineThreadDimensions,Sizes,Diameters) Thread(in) Threads per inch (tpi) MajorDiameter MinorDiameter Tap Drill Size (mm) 3 SOCKETHEAD COARSE THREAD BOLT size-pitch LUBRICATED WITH ANTI-SEIZE in-lbs Nm in-lbs Nm 1/4”-20 150 17 100 11 ft-lbs Nm ft-lbs Nm 5/16”-18 26 35 18 24 Bolt Size Threads Per Inch (TPI) Coarse Thread UNC Fine Thread UNF #0000-160 #000-120 #00-90 #0-80 #1: 64: 72 #2: 56: 64 #3: 48: 56 #4: 40: 48 #5: 40: 44 #6: 32: 40 Metric Threads. The torque figures for a finely-threaded fastener as compared to a coarsely-threaded fastener of the same diameter may be slightly higher but hardly worth mentioning. northwestfastener. METRIC COURSE AND FINE THREAD CHART . See Table 4c. It is the most commonly used worldwide thread system. 4 %Çì ¢ 5 0 obj > stream xœÍ}ý³$·qXÑr,ó”rB}XNlKk'¶w]ÚÑà HÊ?0–åŠI«lóR®J˜ îxïî( ßñŽG)Î_Ÿn €nÌ4f÷Ý=¦D ‹³ 4Ðènô'0ïÕaž”>Ìøo}øì‹ ?ý§pxöÕƒWðËÄ” gï 'o§”üA Wº¥ÃÏ^>øÇ þðO [ ^?{ðêAœ þ“_ðçϾ8ü·‡ª ¼žíááS€RÓ« g =”rS Žd ŒN@ßjï FÔñÓÛ àf ~‡ IPÿ6Ó#ØdŽŸ¾> »BŠýüìõ¥)X;[Ìïµv úw ** Fine thread figures are for 1-14. 9; M8 x 1: 0. SAE 0-1-2 74,000 psi Low Carbon Steel. ) Standard Pipe Size Threads per inch 0. We recommend checking and re-tightening if necessary, after 2-3 weeks of use or 100 miles to ensure the nuts are tightened to the required torque. 5 m 18x 1. 540” 1/4” 18 THREAD DATA CHART; British Thread (British Standard Fine) -- Fine Pitch; Nominal Size BSF Thread Form Type Major Diameter mm d=D Pitch mm p Threads per inch tpi Fine thread. CHARTS Menu Toggle. nuts equal 75% . This includes A193 B7, A193 B8 THREAD DATA CHART: Metric Thread -- Fine Pitch: Nominal Size ISO MF: Thread Form Type: Major Diameter mm d=D: Pitch mm p: Root Radius mm r: Pitch Diameter mm d2=D2: Minor Diameter Male Thd. above 1". com 13 Threads * 1. -lbs. For example: a 3/8 coarse thread grade 5 bolt has a maximum dry torque of 23 ft. Preload (N) property class to ISO 898/1 Tightening torque (Nm) property class ; Thread Coefficient friction 8. 13M. Carbon Heat T. The failure will occur at the root of the nut threads. Jan 4, 2025 · For example, bolts used in automotive applications often follow fine thread standards, while construction bolts use coarse threads for ease of assembly. 052 0. Identify the Bolt Grade and Material Start by locating the appropriate grade of your bolt (e. 9743/n)] 2; where: A s = Bolt Thread Tensile Stress Area (in 2) d = Nominal Bolt Diameter (in. Grade 2, 5 and 8 values are for plated bolts. 5 Additionally, UNC (Unified National Coarse) and UNF (Unified National Fine) threads represent different thread pitches, impacting the strength and tightness of the connection. 0x0. Section at Minor Dia. There are two common methods to write the thread dimensions. The following table shows the tightening torque for metric fine thread fasteners. ANSI/ ASME EXTERNAL Screw Thread Size Chart. You can also made an conversion from the unit Nm to ft lbs and also from ft lbs to Nm. These threads are recommended for general use on thin-wall tubing. 2. g. 002 #1 […] The ISO metric screw thread family is a series of general-use, 60° straight threads. The sixth column in both charts is the second most essential bolt dimension. 405” 1/ 8” 27 0. 00: 0. When deciding between these options, you must balance factors like location, material compatibility, and strength requirements, as the wrong choice can lead to problems **Fine thread figures are for 1-14. Such charts help avoid mismatches, reveal compatible sizes, and guide engineers through challenges when working in mixed-standard environments. Basic Pitch […] Coarse Thread Series (UNC/UNRC) is the most common designation for general application bolts and nuts. 8 Grade Bare/Zinc (1st Fine) Title: Metric Bolts, Screws & Nuts: Tightening Torques Author: Fastener Mart Created Date: 8/12/2006 10:22:23 PM 6605 N. h3: Thread Height Female Thd. TPI in Textile Threads In the textile industry, TPI is a key factor in determining the quality and strength of fabrics and sewing threads. UNF threads have a 60-degree thread angle and a rounded crest and root. Home; Products; Metric Fasteners. Thread Pitch Chart Coarse Thread Series - UNC Fine Thread Series - UNF 8 – Thread Series – 8UN Nominal Size & Threads Per In. The following table of thread sizes for coarse and fine pitch thread was created using the standard sizes from ASME B1. 75 (coarse) thread has a 1. Metric Fine Thread is finer than USA UTS Unf American fine thread in that there are more threads per inch, in addition to this the metric standard also allow extra fine threads and creates standard information to back it up. For standard-size bolts, the thread pitch is either fine or coarse. The following table chart defines standard metric external thread size M1. of the bolt proof loads specified for SAE J-429 Grade 5, and ASTM A-449 bolts. of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. Unified Screw Threads per. The tensile stress area of the threaded portion of a fastener is determined by the size (diameter) of the bolt and by the thread pitch (spacing), as follows A s = 0. The size of a metric fastener (screw, bolt, etc. Acceptability criteria are described in ANSI/ASME B1. The nut and bolt are the same strength. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. British Standard Fine (BSF) A finer pitch series, analogous to the American Unified Fine (UNF), although - unlike the case of BSW/UNC - with none of the pitches in common with UNF. d3 Minor Diameter Female Thd. There is no difference in the above chart between the torque figures for fine or coarse threads. 5 150 110 210 154 250 184 m 16 x 1. A reference chart to view the thread pitch for metric coarse, metric fine and extra fine and imperial fasteners UNC (unified national coarse) and UNF (unified national fine) and includes hard to find fasteners like BSW (British standard whitworth), BSF (British standard fine) and BA (British association). the nut and/ or bolt's thread . 95 ft. above for the fine threads. It has a 3/8" nominal major diameter and 16 threads per inch. Metric bolts, however, have super fine thread pitch—granted that only bolts M10 and M12 have super fine thread pitch options. Basic Dimensions for Coarse Thread Series Parts (UNC/UNRC) Basic Dimensions for Fine Thread We would like to show you a description here but the site won’t allow us. Additionally, metric and imperial threads follow different tolerance standards, making it crucial to consult a bolt size chart that compares both systems. D1: Thread Height Male Thd. , Grade 2, Grade 5, or Grade 8) and its material type. 3. sales@thenutplace. It was used for steel bolts and nuts on much British machinery, including cars, prior to adoption of Unified, and later Metric, standards. 8 Grade Bare/Zinc (1st Fine) Thread Identification Chart (Metric – Coarse/Fine) Hardware Sizes: Metric Screw Thread. Bolt Thread Sizes. + Aerospace applications generally use coarse threads on sized 8-32 and smaller. 6 to M18 per. 13M-1995. Because of the larger THREAD DATA CHART: Metric Thread -- Fine Pitch; Nominal Size ISO MF Thread Form Type Major Diameter mm d=D Pitch mm p Root Radius mm r Pitch Diameter mm d2=D2 Minor Diameter Male Thd. 75). + Coarse threads are used when threaded into aluminum or cast iron because the finer threads tend to strip more easily in these materials. Many motorcar and motorcycle manufacturers commonly used a lot of BSF threads. Grade 2, 5, and 8 values are for plated bolts. Steel. Limitingdimensionsandtolerances,classes1,2,3,and4fits,AmericanNationalcoarse-threadseries— Continued DIN 960 / ISO 8765 Partially Threaded Hex Cap Screw (Fine Thread) 8. 2: M: 1. ISO 261:1973 ISO general purpose metric screw threads - General plan; ISO 262:1973 ISO general purpose metric screw threads - Selected sizes for screws, bolts and nuts; ISO 724:1993 ISO general-purpose metric screw threads - Basic dimensions; ISO 965-1:1980 ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data Metric Thread Chart, M1 - M100. H1: Tap Drill Diameter mm 1. dugbyw svnio xtw zdgbu devtk cynkbpaf bfwk zosbutx qskucg jjgjl