However, in the 1983 version, these widths across flat dimensions were brought in line with iso 4032. Stud bolts with metric thread are designed to perform functions similar to those of double end studs clamping type or interferencefit type. When furnished in hotdip galvanized finish, oversize tapped hex nuts must be used. Limits of sizes for general purpose bolt and nut threadsmedium quality.
The rest of the dimensions are tabulated values from the asme standard. In 1967 version of this standard, the widths across flat dimensions for ml o and ml 2 size fasteners were specified as 17 mm and 19 mm respectively. Well, good news is that fasteners are made to universal specifications that are known globally. Jan 17, 2019 for specification of imperial bolts thre and hole countersunk hole an overview sciencedirect topics socket head cap wrench sizes fastener handout fastener handout countersunk hole an overview sciencedirect topicscountersunk hole an overview sciencedirect topicsdrill and counterbore sizesdrill and counterbore sizes for socket head cap s perholes chartssizes sizing chart socket cap asmhelicoil. A table of major diameters and pitches, up to 30 mm in diameter thread classes of fit. Din 976 metric thread stud bolts dimensions, specifications, standard, weights, equivalent and download pdf email. Standard u bolts are available off the shelf in mild steel zinc plate and stainless steel. Besides fasteners, the other main products that boltfast supplies are. Iso 4762 dimensions, specifications, standard, weights. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. The nut thickness shall be the overall distance, measured parallel to the axis of nut, from the top of the nut to the bearing surface and shall include the thickness of the washer face where provided. Standard part 2 contains specifications for hexagon head bolt with metric screw thread from m 42 to m 160 in product grade b.
Standard external metric thread and fastener sizes m 0. Limits of sizes for general purpose bolt and nut threads medium quality. This standard covers stud bolts with threads produced to tolerance 6g which is customary for bolt nut assemblies of thread engagement group n as specified in din iso 9651. Din 580 lifting eye bolts collar eyebolts for lifting purposes dimensions, specifications, standard, weights, equivalent and download pdf. A short guide to metric nuts and bolts 2 thomson rail. Din 580 dimensions, specifications, standard, weights. The objective of this standard is to provide manufacturers, suppliers and users with the dimensions, tolerances and material requirements for hexagon head bolts iso product grade c with iso metric coarse threads. General dimensions of structural bolts as1252 1983 bolt dia. Gradea bolts are the preferred style for most applications.
The figure 283pvc is for support of piping where contact with the pipe is not desired. Standards for metric bolts are promulgated by the iso, but adopted by individual nations dimensions. Metric high tensile, precision hexagon head bolts, screws and hexagon nuts. Iso metric screw threads are designated by basic diameter and thread pitch. Gradeb bolts have looser tolerances and can be manufactured in a cold or hotforging. Ubolt can be furnished with longer tangents d or with longer threads e. Standards for dimensions and tolerances are issued. There are a variety of standards used to define drill sizes, the most common one in the uk is the british standard bs 328 set which includes twist drill bit sizes between 0. Legally binding document step out from the old to the newjawaharlal nehru invent a new india using knowledge. Width across flats wrench size and corners, nut height thickness and thread pitch dimensions are given for nut sizes between m1. Metric socket countersunk head screws din 7991 bs 4168 iso 10642 materials and finishes steel 10. Size limits for standard external thread tolerance classes 6g and 4g6g apply prior to coating.
Nuts m16 and smaller are chamfered on the top and the bearing surface. Head sizes may differ from what is shows due to differences between metric standards measure length from under the mm 10 20 30 40 50 60 70 80 90 100. Do not use these values for standard metric internal thread design. Dimensions refer to the basic profile in accordance with iso 68. The external thread allowance may thus be used to accommodate the coating thickness on coated parts. Din iso metric fasteners crossreference din iso jis category standard standard standard description 68 internal threads, class 6h 8981 external threads, class 6g r1501 internal threads, class 6h 84 1207 machine screws, slotted cheese head 85 1580 machine screws, slotted pan head 125a 7089 flat washers, standard 126 7091 flat washers. Iso 724 specifies basic dimensions of metric threads in accordance with iso 261. A style 1, heat treated fastener with a metric thread pitch. When referring to standards and specifications, we. Us hex bolt sizes and thread pitches continued mm 10 20 30 40 50 60 70 80 90 100. Metric hex nut dimensions sizes chart according to iso 4032.
This standard contains specifications for fully threaded hexagon head screws with coarse metric thread for diameters m 1. This international standard gives specifications for fully threaded hexagon head screws with metric dimensions and thread diameters from 3 mm up to and including 36 mm. Width across flats width across corners height of head d p ds s e k max. Iso 4762 hexagon socket head cap screws dimensions, specifications, standard, weights, equivalent and download pdf.
Therefore, all you have to do is look at a hex bolt dimensions chart and you will find everything you need to know. Thread diameter d m 3 m 4 m 5 m 6 m 8 m 10 m 12 m 14 m 16 m 20 m 24 m 30 m 36 thread pitch coarse 0. Metric thread extended thread size range iso thread height male thread h3 thread height female thread h1 sorted by thread class click here to return to the thread data chart page index. Metric thread pitch table metric pitch table metric diameter pitch mm coarse standard fine standard 3mm 0. Standard metric hex nuts, types styles 1 and 2 per. Limits of sizes for general purpose external and internal screw. Except for the very lowest grades, metric nuts and bolts all carry iden. U bolt dimensions range from m6 to m20 in terms of thread diameter, with various lengths and specials also available. There are no fewer than 5 different threads for different applicaons and 10 different standard strength grades defined for each size of bolt. Although the head dimensions for structural bolts are the same as any heavy hex headed fastener per asme b18. Principles and basic data iso 96521980 iso general purpose metric screw threadstolerances part 2. This standard covers stud bolts with threads produced to tolerance 6g which is customary for boltnut assemblies of thread engagement group n. Metric hex bolt diameters and thread pitches mm 10 20 30 40 50 60 70 80 90 100 110 120 140 150 160 170 180 190 200 210 220. If the pitch is the normally used coarse pitch listed in iso 261 or iso 262, it can be omitted e.
The designation of a screw thread gives the thread symbol, the nominal size, the pitch, and the thread tolerance class ex. Have you ever wondered how thick is the head of the bolt that i just bought. Here, r min is minimum root radius, t d2 is pitch diameter tolerance and h is height of sharp vthread. Iso metric profile external bolt thread internal nut thread basic mm size mm thread designation simple thread designation pitch mm class major dia. Metric countersunk hole dimensions chart a pictures of hole. Standard ubolt figure 283 carbon steel figure 283pvc pvc coated figure 283ss stainless steel our standard ubolts are recommended for use as supports or guides for piping. B3188ns nonstandard ns ubolts are available upon request. This standard is part 1 of a twopart series on iso metric hexagon bolts and screws. Metric drill sizes are used primarily in europe and use metric units to measure the drill bit diameter. Maximum rounded form minor diameter d 3max d 2max 0.
Din 976 dimensions standards specifications micronsteel. A short guide to metric nuts and bolts dd thomson rail. Standard ubolt figure 283 carbon steel figure 283pvc. Head sizes may differ from what is shows due to differences between metric standards measure length from under the mm 10 20 30 40 50 60 70 80 90 100 head to the end of the bolt. The standard metric fastener thread series for general purpose threaded components is the m thread profile and the coarse pitch thread series. Metric millimeter bolt and nut substitutions will be allowed in. Metric hex bolt diameters and thread pitches bolt depot. Because iso standard covers only sizes up to m 36, the din standard was subdivided into part 1 m 1. For example, m10 or m106g, by default, specifies m10 x 1. Nuts m20 and larger may be double chamfered, or have a washer face on one side and a chamfered surface on the opposite side. Iso metric screw thread chart 1st 2nd height flat size external diameter choice choice h mm af mm ac mm 10. The nut thickness shall be the overall distance, measured parallel to. The following table chart are standard metric external thread sizes m 0. Limits of sizes for general purpose bolt and nut threads medium quality 95.
For a given diameter, a fastener may be available in coarse standard, fine and sometimes super fine thread. In metric bolts, strength is described by property classes. Imperial, metric fine and non standard metric sizes will be manufacture. Metric countersunk hole dimensions chart a pictures of. Below is a chart with the dimensions of our stocked high tensile bolts, in accordance with australian standards. On the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3. They can be created to drawings or customer specification and can be manufactured to order, please send your requirements. Nominal sizeand thread diameter d depthof w ash erfc c transition dimt da diameterof unthreaded shank ds dia.
Here, r min is minimum root radius, t d2 is pitch diameter tolerance and. Iso 7241978 iso metric screw threadsbasic dimensions iso 96511980 iso general purpose metric screw threads tolerances part 1. Length is measured from under the head to the end of the bolt note. A metric iso screw thread is designated by the letter m followed by the value of the nominal diameter d the maximum thread diameter and the pitch p, both expressed in millimetres and separated by the hyphen sign, e.
753 239 612 302 1282 828 608 921 774 640 177 1518 622 284 628 1235 323 1420 994 1238 1183 851 1435 84 1249 327 1484 1098 467 444 1102 920