b For uncoated hot-rolled, but not standard fasteners with cold rolled threads. Thread Milling. Standard-metric wrench chart. Metric thread size and tolerance calculator was developed to calculate major, minor and pitch diameters of the external (bolt) and internal (nut) metric threads according to ISO 724:1993 standard. Except the thread size doesn’t define the size of the tool used – I have M5 bolts which take a 3mm AK (not to mention those with screwdriver slots). Port to be identiﬁed by marking "metric" next to it or "ISO 6149-1 Metric" on component name plate. International Standards Organization Metric Screw Threads. We serve construction workers, homeowners, and more for the last 59 years. BSP parallel threads commonly seal via a 30° chamfer on the male thread to a 30° recessed. The Germans, Swiss and French each developed their own metric screw thread forms. Now refer to the “Actual Major Diameter” column on the chart and then look left to see the Metric and Imperial name of that size. In other words, metric ticket is three times the metric count for the whole thread. For example: M12 x 1. This is the number starting with an “M”. The following items are no longer on promotion and the default item has been added in their place:. If the pitch is the normally used "coarse" pitch. Formula: Major Dia. metric or imperial measures we can supply your needs. Clamp the caliper around the bolt and adjust it until it fits and it should provide the exact measurement you need in millimeters. For example, 3/8-16 for a coarse thread, and 3/8-24 for a fine thread. Millimeter Size to Inches Select a metric size. All metric fittings are measured in millimeters. Keep in mind that tapered (as determined in Step 1) does not necessarily mean that it is a pipe thread (e. A thread's pitch size is the number of threads per inch or the distance between threads on metric thread types. 4 2 1/4 19 1. Define the thread by the information you now know. The shorter distance between the threads allows for more threads per inch, just as they do under SAE standards. First of all you neet to go up to the pull down menu and select 'Tools' and then scroll down and select 'Options' This dialog box will come up. It is the main standard for bolts, nuts, and a wide variety of other threaded fasteners used in these countries. This would be a “fine” bolt. pitch is the distance in mm from any one point on a Related searches. Engineering Supplies. All taperlock thread plug gages are class X tolerance. The thread dimensions and profile accuracy are crucial for determining: Whether a coating can still be applied to the screw thread; Whether the parts to be joined can be screwed together on assembly without difficulty or the need for reworking; Whether the thread can transmit the forces for which the components were dimensioned. 1 - 64 1 - 72 M2 x 0. hreads - C. Pipe Thread Types and Designations Overview: Different types of screw threads have evolved for fastening, and hydraulic systems. hastingselectrical. The geometry and sharpening of the cutting edges is crucial to the performance of the bit. Pitch refers to the distance from one thread groove to the next (measured from crest to crest). For tapered thread: measure on the 4th or 5th full thread. Choose Tolerance position for d/D1: ISO Metric M and MF Thread. Guide to Fastener Sizes. If another weight is given for thread (like ounces), it refers to the amount of thread on the spool. Specify nominal diameter and threads. In the 80’s they started giving engine displacements by liters instead of cubic inches and engine fasteners all became metric, part of the task of metrifying for more international. UNIFIED EXTERNAL SCREW THREADS Classes 2A & 3A UNRC. Except the thread size doesn’t define the size of the tool used. Choose from class 2B or 3B for inch, or class 6H of fit for metric thread plugs. 0006 per surface, the values used in the. 03937 = Inch NOTE! At dimensions over 1" decide if its you want UNC or UN8 thread. Metric spanners relate to the gap between the jaws in mm and therefore equate to the dimension across the flats of the nut. —ISO metric screw threads for screws, bolts, and nuts, 0. The female has a 24° convex cone with O-ring and a swivel straight metric threaded nut. All dimensions displayed as inches are converted from the metric values. Round roots are now the norm in the USA and the thread is described are UNRC, UNRF the “R” for round root. The treads are used on a cylindrical shaped surface and used as the fasteners. (Major diameter builds faster than the minor diameter), therefore you should look for a thread which is at least. 082) M3 x 0. You find the thread diameter to be 0. Step 1: Determine if the thread is tapered or straight (parallel). Whether it's for standard metric or imperial measurements, our simple-to-read bolt thread length chart makes understanding thread length easy. Choose from external-to-internal, external-to-external, or internal-to-internal thread adapters. dimensions are converted to metric units and standard metric threads are used. 0 means that the threads have an outer diameter of 12 mm and an inter-thread spacing of 1. Size 6 & 7 are thicker than Nylon #18/C-Lon Bead Cord and thinner than C-Lon Tex 400. Part 2 tabulates diameters of coarse, constant and ﬁne pitch series threads,. Comprehensive technical information on thread gages for measuring threads. Choose from class 2B or 3B for inch, or class 6H of fit for metric thread plugs. Users are able to select an existing thread feature in the model, which the threadModeler then converts to a realistic 3D modeled thread based on the underlying thread. Besides using metric measurements, a metric bolt uses the distance between the threads rather than the thread pitch, used in American measurements, which is the number of. will do everything possible to ensure that you are always pleased with quality products and friendly service you will receive in coming to us. My experience with actual "thread reliefs" was with a Mil-spec defined by the FED-STD-H28. Thread Milling. For metric thread sizes with excellent resistance to chemicals and salt water, choose these 316 stainless steel shoulder screws. As an example: M6 x 1. A metric bolt written as 10 x 1. 1525), as one might expect. Example: M22 x1. If all you had was a metric thread gauge, that's what you would come up with if you measured a 1/4x28 thread. Also known as TEK Screws, "Drill-Bit Points" Eliminate Pre-Drilling. Below is a reference guide for the some of the more common thread patterns for factory shipped barrels. A reducer allows you to reduce the size of a female thread. We also offer internal-to-external threaded stud adapters. Festo supplies for example the DSNU, DNC, ADN, … with a nut on the piston rod if a fine thread. This is represented by the last number in a metric bolt's designation. Stellram offers both external toolholders and internal bars with through coolant. Round roots are now the norm in the USA and the thread is described are UNRC, UNRF the "R" for round root. pitch is the distance in mm from any one point on a Related searches. 0000 ~127 0. M8 means metric thread of 8mm outer diameter. Use chart as a visual aid to compare millimeters (mm) to decimal inches. For example, for a Threaded Spacer, the metric requirement might be "M 3. Metric Gears. The diameters, threads per inch (TPI) and thread pitch, etc. This percentage is thoeretical as holes are often drilled slightly oversized. Metric ticket gives the metric count yarn size for the 3-ply thread with the same weight as the thread being measured. 900+ Size & Style Options. These constants assume you are working in millimeters, not inches. Both the TPI (threads per inch) and OD (outside diameter) of the thread are required for positive identification of thread size because several sizes have the same TPI. thread will change the pitch diameter by approximately 40μm (0,040mm) as all four thread flanks will be coated. Getting in. This is the same value as Class 3A. Specify quantity. The treads are used on a cylindrical shaped surface and used as the fasteners. —Wire sizes and constants, single-start Buttress threads (7°, 45°) 60 Table 14. 80 13BA 102. Rolling of external threads Generality One of the most efficient systems for the generation of external threads is precisely the thread rolling, this consists of a cold lamination, which exploits the properties of certain materials to deform plastically. Tapping Size. 0 x 20 4 x 3/4 3. If this is not the case, reference ASME Y14. Brown offers a large selection of metric grease fittings including button head, flush, hydraulic and self-tapping styles. Dash numbers are not applicable to metric threads. Metric bolts are sized according to diameter, distance or spacing (in millimeters) between threads and length. It could be a metric count size. Metric conversion chart - get metric and US customary units in a convenient metric conversion table format. a For Class 2A threads with coating (plating) the max. ThreadPal is a calculator for unified, unj, uns, acme, buttress, npt, metric, trapezoidal, whitworth, and bsp screw thread dimensions, plus special sizes. 8,000+ Parts with Size, Head, Drive, Material & Finish Options. Metric Screws. The system the callout uses is very important since similar screws can be different sizes. Shop a large range of metric thread fittings at MSC Industrial Supply. 020 n = Number of threads per. Metric Diameter Inches: STYLE* Tap Dimensions - Inches: Over: To(Incl. 010 2 Fr =. Most mechanics recognize the thread series by the threads per inch number. Major Diameter : Minor Diameter: Minor Diameter : K Value tolerance: 4h. Class of Threads, H Limits Classes Of Threads There are (3) established Classes of Thread, designated in the unified series by adding: "A" for Screws and "B" for Nuts (or other intenal threads) to show definite limits and tolerances. Imperial system of measurement, on the other hand refers to the system used in the British Empire in the 19th and 20th centuries. Requirements L Axis of screw thread Basic major diameter Minor diameter Basic pitch diameter L Description A metric machine screw is a straight shank fastener with a metric thread pitch designed to go through a hole or nut that is pre-. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Eagle specializes in hard to find fasteners and components. Below is a reference guide for the some of the more common thread patterns for factory shipped barrels. 0mm metric thread. Commonly used on Nitrous Oxide systens. Nominal Size Carbon Steel Pipe - OD (mm) Inch Metric KS/JIS ASTM ISO DIN Metric Inch Other (Standard) Rule Europe Piping Chart Outside Diameter Comparison. Standard-metric wrench chart. Choose Tolerance position for d/D1: ISO Metric M and MF Thread. Most mechanics recognize the thread series by the threads per inch number. Thread Depth. 059 #1 DIA = 0. Choose Tolerance grade for d2/D2. A list of 16 thread sizes are defined by the standards, ranging from 1/16 inch to 6 inch. I expect a little growth but this is excessive. Cheese Slot Metal Threads G304 & G316 Metric 1m and 3m Mild Steel Threaded Rod - Metric Property Class 4. A force fit requiring the application of high torque for semi-permanent assembly. 0 PG42 60 13 68 39. For metric bold thread size, the formula is the thread diameter, followed by the "x" symbol and then the thread pitch number. External 2779:1956 Medium Class BSP. Bolt Diameter (mm) Thread Pitch (mm) Standard Fine Extra or Super Fine. Includes both the newer Metric needle size designation and the older Singer needle size designation. Suggested seating torque values, only apply to metric Grade 12. We manufacture non-standard and specialty large diameter nuts and bolts. Tools recognizable as twist drill bits are currently produced in diameters covering a range from 0. Gage Assembly can produce high quality taperlock thread plug gages. M22 couplers are used to join or separate quickly fluid conducting lines, without the use of tools or special devices, typically related to the pressure washer hoses, pumps, spray guns and wands. How to Measure a Screw. The thread size is determined by the outside diameter of the male thread, or the inside diameter of the female thread. Thread Milling. Rolling of external threads Generality One of the most efficient systems for the generation of external threads is precisely the thread rolling, this consists of a cold lamination, which exploits the properties of certain materials to deform plastically. The female has a 24° seat or a tubing sleeve and straight metric threads. 4 by the Thread-per-Inch (TPI) value, thus a fastener with a TPI of 32 will give 0. Part 1 provides information and data on the basic principles, and is based on ISO 965/1 and ISO 965/3. The length of the inserts in inch and metric packages is 1-1/2 times the diameter of the bolt. 00 Thread Angle 47. Brown offers a large selection of metric grease fittings including button head, flush, hydraulic and self-tapping styles. If you are looking for HanYan 20mm × 1. Metric spanners relate to the gap between the jaws in mm and therefore equate to the dimension across the flats of the nut. While a ruler could be used to calculate the pitch size, a pitch gauge is highly recommended as pitch sizes can be very similar. Print this page. British standard pipe thread rate chart. These numbers describe the thread and relate to the size of the wrench that should be used on them. The connections are. This can be difficult for those inexperienced with threads. ASM provides fastener specifications & SAE dimensions including tolerances, thread dimensions, machine screw specs, tap sizes, & length tolerances. Above diagram shows about 1/2”. 0 items in cart Checkout. The Combo (Inch & Metric) Thread Checker ™ is an accurate and easy-to-use thread identifier for both nuts and bolts. METRIC THREAD -- FINE PITCH -- M (1 mm - 28 mm) METRIC THREAD -- FINE PITCH -- M (30 mm - 64 mm) METRIC THREAD -- FINE PITCH -- M (65 mm - 100 mm) METRIC THREAD -- COARSE PITCH -- MINIATURE SERIES -- BS 4827 -- S. Metric ticket is very widely used. Screw Thread Gaging Systems for Acceptability-Inch and Metric Screw Threads (UN, UNR, UNJ, M and MJ) M Metric Screw Threads — M Profile Gages and Gaging for Metric M Screw Threads. Thread rolling is a cold forging process that can be performed on any ductile metal. We will have a grid of logos, when clicked takes you to their estore website. Thread Size. It is important to select the right thread size and thread type for the application. 5 mm Yes you see this. The female has a 24° seat or a tubing sleeve and straight metric threads. Over the decades Hague Fasteners have machined every conceivable thread form and thread pitch combination, relying on British, ISO, American, indeed all International standards to verify the data needed to produce critical components in all …. english/ metric bolt substitution table equivalent metric bolt substitution – astm grade bolt sizes f - 568 class 4. My advise to your company: time to change to metric completely and discontinue the 1/2" stock. The shorter distance between the threads allows for more threads per inch, just as they do under SAE standards. This table is only to help find a nearest equivalent sized fastener. Above diagram shows about 1/2”. 3125 tap-drill (5/16). Threads that gage loose or tight may require. While for standard thread pitch measurements the lower number is coarse thread and the higher number refers to fine thread, in metric this is opposite. **Minimum recommended needle sizes. All metric fittings are measured in millimeters. TAP – DRILL RECOMMENDATIONS Tap Size Cutting Taps Tap Size Cutting Taps Forming Taps and Pitch Drill Size Dec. Metric bolt conversion data for industrial bolts/rods, machine screws and small diameter fasteners from Elgin Fastener Group includes metric to standard bolt conversions. If the 45° is critical and a compound angle is not feasible, the chamfer may require machining after roll threading. 18-8 Stainless Steel Metric Hex Drive. 00 Class 6h Depth 25951 26351 M 5x0. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 5Tolerance zone for internal thread: 4H to 8HTolerance zone for external thread:4h, 6h, 8h, 4g, 6g, 8g This app calculates the tolerances. Metric screw sizes provide a diameter and length in mm. english/ metric bolt substitution table equivalent metric bolt substitution - astm grade bolt sizes f - 568 class 4. The most common type of micrometer, the screw gauge, has precisely machined threads in the handle that are used to advance and retract a shaft, or spindle. ISO Metric Theads. 1) For metric threads pitch is the distance between threads. THREAD DATA CHART: Metric Thread -- Coarse Pitch: Nominal Size ISO M: Thread Form Type: Major Diameter mm d=D: Pitch mm p: Root Radius mm r: Pitch Diameter mm d2=D2: Minor Diameter Male Thd. 37 M14 2 21 20. h3: Thread Height Female Thd. 0 means that the threads have an outer diameter of 12 mm and an inter-thread spacing of 1. A full designation for a metric thread includes information not only on the thread diameter and pitch but also a designation for the thread tolerance class. Gauges for testing ISO metric screw threads to the latest BS Standards 3643:2007 and BS 919:Pt 3:2007. My advise to your company: time to change to metric completely and discontinue the 1/2" stock. How to Order Metric Thread Rings Call Toll Free 1-800-736-4243 (All verbal orders must be confirmed by fax or formal P. Metric callouts look somewhat similar to U. Threads that gage loose or tight may require. British standard pipe thread rate chart. Thread Identification BSPP or Metric Thread Metal Seal BSPP or Metric Thread "ED" Rubber Seal BSPT Thread or Metric Taper Thread NPT Thread SAE Male Thread (O-ring boss) O-ring Seal ISO6149 Metric Thread O-ring Seal BSP Threads Dash Size Designation Thread O. Not even interchangeable. 1:2009) Published by DIN on January 1, 2010 This International Standard specifies the basic dimensions, in millimeters, of ISO metric screw threads in accordance with ISO 261. Specify nominal diameter and threads. Use the Teesing thread gauge to determine the pitch or the TPI. Choose a metric thread size and pitch 2. Threads produced should be checked with thread plug gages to ensure that the threads meet required specifications. The diameter refers to the major diameter, or outside edge, of the threads. You can measure Whitworth (BSW)threads, UN threads, ISO metric theads, Trapezoidal, Acme, Stub Acme and National Pipe Taper threads. PG Metric-Thread Liquidtight Fittings: 1. 1 covers threads of 60-degree form with flat crests and roots in sizes from 1/16 inch to 24 inch Nominal Pipe Size [NPS] (this standard also covers various parallel ('straight') threads. 102 - Metric 90 Elbows Type 1. 5 MM Grease Fittings. C65586 Cleveland Hex Fixed Die, Metric, Die Thread Size: M16x2. (The heavy. All dimensions are in mm 1. FMW Fasteners | World Headquarters. Over the decades Hague Fasteners have machined every conceivable thread form and thread pitch combination, relying on British, ISO, American, indeed all International standards to verify the data needed to produce critical components in all …. 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. Although most metric fasteners have two or more standard pitches (fine & coarse threads), the pitch is often omitted from a thread callout; it is always helpful to carry a sample with you to the hardware store. This Toolbox dialog box will pop up. SOLIDWORKS 2016 introduced the ability to create helical threads on cylindrical faces. However, there are other thread standards as well. Step 2 - Find the Pitch. This size drill bit. Understanding Screw Sizes - Inch Standards Screws with a diameter smaller than 1/4" have a nominal size indicated by a number (e. For metric threads, the pitch number is the distance between threads. Catalog number series shall be 7330. The below table gives the Threads Per Inch, Pithc and Major Diameter for NPT Threads. Hex Head with Coarse Threads and Sharp Points; Used in Wood Applications. Cutting and Threading > Thread Repair > Master SAE & Metric Rethreader Kit - 40 Pie Cutting and Threading Thread Repair Master SAE & Metric Rethreader Kit - 40 Piece Master SAE & Metric Rethreader Kit - 40 Piece. Pitch (mm) Drill size (mm). 03937 = Inch NOTE! At dimensions over 1" decide if its you want UNC or UN8 thread. This is the chart you're looking for. All tube accessories for Kobelco fittings belong to the L-series (for medium pressure). 87 threads per centimetre (20 threads per inch)? Does anyone know what this equates to in terms of M3, M4, M5, M6 or which of THESE it would be. M22 couplers are used to join or separate quickly fluid conducting lines, without the use of tools or special devices, typically related to the pressure washer hoses, pumps, spray guns and wands. Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in. Although most metric fasteners have two or more standard pitches (fine & coarse threads), the pitch is often omitted from a thread callout; it is always helpful to carry a sample with you to the hardware store. Can you use a metric die to thread a standard size rod? all I can find is standard size rods at hardware stores can I use a standard size rod with a metric die to create threads on that rod? * Registered users of the site do not see these ads. 669873 3 50. Use these where head height is more crucial (ie inside laptop) Zinc Stainless Steel. • Left hand available, price on application • Larger sizes available, price on application. Dimensional data: metric stud bolt to nut table will help determine the correct size bolt or nut for your purpose. Hex Nylon Insert Lock Nuts - Fine Pitch - Metric Class ≥5 - Zinc Plated - DIN985 - UN0227 Standard Dimensions : UN0227 Hex Nylon Insert Lock Nuts - Fine Pitch Metric Class ≥5 Zinc Plated DIN985. 057) #48 (0. Classes 2A -The maximum diameter of uncoated (unplated) class 2A, (external) thread are less than the basic by the amount of allowance. 0 means that the threads have an outer diameter of 12 mm and an inter-thread spacing of 1. the metric thread designation uses pitch in place of the more familiar u. Hi, Is there a way to have a few metric dimensions in a drawing that has units in English? I'm not sure whether or not to go "all English" on the drawing, because the two bores that need to be added are for metric bearings. Thread Depth. Your company because of overseas sales requires metric design. This percentage is thoeretical as holes are often drilled slightly oversized. Metric J Form PAGE 225 Unified J Form PAGE 232 STUB ACME PAGE 231 ACME British Standard Pipe Taper Thread National Taper Pipe Thread British Standard Whitworth PAGES 227 - 228 PAGES 222 - 224 American Unified PAGES 217 - 221 ISO Metric PAGES 214 Partial Profile 55° PAGES 215 -216 Partial Profile 60° Thread Form Index. FITTINGS UNLIMITED, INC. Metric thread taps are made with high carbon steel (HCS) for strength and durability. Welcome To Our Updated Website. As an example: M6 x 1. 2 pounds 1000 kg = 1 Mg = 1 metric ton = about 2200 lbs. 00 Thread Angle 47. Metric Conversion. (1 m² = 10. The calculations are based on the British standard Metric ISO Limits and Fits. 4) Reference only. #8 or #10). According to "High Performance Fasteners & Plumbing" by Mike Mavrigian, "metric pitch numbers graduate opposite those of fractional pitch numbers. 376202 m56 5. HeliCoil Insert Drill Sizes - UNC/UNF. I am getting used to getting US plans and converting to metric, it’s not as easy as a calculator or mixed system rapes and rules. 5 mm between threads. Commonly used on Nitrous Oxide systens. Size 5 is comparable to Nylon #18/C-Lon Bead Cord. are necessary to completely identify a thread. In the case of Screw Thread Insert (STI) gages the the thread designation refers to the insert thread so the size of the gage for the tapped hole is larger than the nominal size. Machine, SEMS & Thread Forming Screws with Metric Threads. Helicoil Thread Repair Kit - Metric Helicoil Thread Repair Kit - Inch Helicoil Tool Kit Helicoil Kit Helicoil Metric Kit Helicoil Inch Kit Helicoil Aerospace: Helicoil Insert Helicoil Inserts Helicoil Size Chart Helicoil Drill Chart Helicoil Tapping Chart Helicoil Thread Gauge Heli-coil Aerospace: Helicoil Tangless Insert Helicoil Aerospace Part. Flexible conduit size shall be 1/4” to 2”. UNC/UNF and BSW. First, when ordering or identifying the dimensions of a metric fastener, all metric fasteners are preceded by the capitalized letter 'M'. M10x1 thread, 9mm tap drill size. (The 90° has a longer interaction leaving a greater lenght of material to become a burr. If you layout the thread in CAD or on paper (if your good) you will see that a standard 60° profile thread (UNC, UNF, METRIC, etc. 0 - 4g6g indicates a metric thread form "M", "6" mm nominal. Dash numbers are not applicable to metric threads. 5H + 2r min (1 − cos (60deg − arccos (1 − T d2 / 4r min )))). It is common to designate metric fine threads with the capital M plus an indication to their nominal outer diameter and their pitch: M size x pitch. 5 PG9 19 8 35 8. The allowable minor diameter indicates sizes from minimum to 6H, but the fine threads smaller than M1. 057) #48 (0. 5, which is the recommended tap drill size. Over the decades Hague Fasteners have machined every conceivable thread form and thread pitch combination, relying on British, ISO, American, indeed all International standards to verify the data needed to produce critical components in all …. a slightly smaller diameter). —ISO metric screw threads for general use, 0. Threads produced should be checked with thread plug gages to ensure that the threads meet required specifications. The connections are. 9; 6mm: 3-5. The thread dimensions and profile accuracy are crucial for determining: Whether a coating can still be applied to the screw thread; Whether the parts to be joined can be screwed together on assembly without difficulty or the need for reworking; Whether the thread can transmit the forces for which the components were dimensioned. Sizes ranging from 3mm - 48mm in diameter and length from 5mm to 500mm. Amazon's Choice for thread chaser metric Best Choice 40-Piece Tap and Die Set - Metric Sizes | Essential Threading Tool with Storage Case 4. PG Thread Dimensions Thread HE LØC ØP ØThread Size mm mm mm mm mm mm PG7 15 8 32 6. 60° thread flank angle, and BSPT has a 55° angle (this can be verified with a thread gauge). Tap Chart - Metric Threads: Tap size: Basic major dia (mm) Basic major dia (inch) mm per thread: Drill size (mm) Drill size (inch) M1. will do everything possible to ensure that you are always pleased with quality products and friendly service you will receive in coming to us. • Manufactured from selected steels to American Gage Design (AGD Style). metric or imperial measures we can supply your needs. M10x1 thread, 9mm tap drill size. For straight thread: measure on any full thread corridor. The machines that perform these processes are specifically designed to make high. 37° angle will be approximately 45° after rolling. For instance, M12x1. Choose Tolerance grade for d/D1. 75mm diameter drill is not common at all. Like inch fastener descriptions, the thread parameter of metric fastener descriptions comes after the thread diameter. Self Drilling Screws. Metric bolts are sized according to diameter, distance or spacing (in millimeters) between threads and length. enter your search here. 5 inches diameter sizes only): These gages have a tapered shank behind the threaded portion. Understanding Standard Size Dimensions. So, anyone that doesn't understand what the numbers mean, Read up so you can understand too! To help you understand tire sizes a little better here's a quick lesson. FITTINGS UNLIMITED, INC. It is especially well suited for distinguishing between similar inch and metric threads. 5% THREAD Metric ThreadsMetric Threads UNC / UNF Threads Tap Dia. Available in multiple configurations and sizes up to 12 mm. PIPE / PIPE THREAD DIMENSIONS Nominal Pipe sizes do not match any of its actual physical dimensions. Cannot specify M13 x 1 Metric Thread I'm trying to apply an M13 x 1 Thread on a 13mm O. BS 4827, ISO miniature screw threads. And whether metric pipe nipple is carbon steel, stainless steel, or iron.