Sizeunrc torque nm inch metric size nominal tightening torque nominal tightening torque size inpounds size nm 4 5 6 8 10 14 516 38 12 58 inchbutton head metric button head 815 30 65 125 200 360 1750 m3 x 0. Threads per inch 307a astm a307 grade a sae j429 grade 5 sae j429 grade 8 f n l g 9 fnl grade 9 clamp load lbs. Lubrication reduces the friction during tightening, decreases bolt failure during installation and increases bolt service life. Bolt torque calculator calculate required bolt torque. Variation in friction coefficients affect the amount of preload achieved at a specified torque. Externallythreaded fasteners metric series property. Ez read hex bolt torque chart metric another in the series of ez read metric bolt chart. Jan 24, 2018 bolt torque chart tightening torque chart for sae metric bolts wrench free 6 sample bolt torque chart templates in pdf suggested tightening torque values fan disc. 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.
Tightening torque chart for sae metric bolts wrench free 6 sample bolt torque chart templates in pdf suggested tightening torque values fan disc corporation approximate values for metric co threads vdi 2230 bossard group. Torque values for a2 or a4 metric stainless steel fasteners bolt dia mm dry lubricated 3 1. The required bolt clamping force for a joint is 20000 lbs. Running torque should be included in the values listed in the tables because any torque puts shear load on the bolt. Service manual supplement july 2016 fastener torque specifications 4 sae and metric fastener torque specifications sae plain and zinc plated hex and socket head cap. Many metric bolts denote the use of metric measurements with an m at the start of the bolt designation, such as m9x1. Torquetension relationship for metric fasteners fastenal. The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters millimeters is abbreviated mm. Prevailing torque lock a nonreversible lock nut used for high temperature applications.
Bolt tightening 2 bolt tightening 21 various tightening methods various tightening methods 34 22 screw and torque relation formula between screw and torque 35 23 torque coefficient 1 formula of torque coefficient 36 2 the torque coefficient is not stable 36 3 even when the torque is stable, axial tension may vary 36. There is an exception thoughif pitch isnt specified, the fastener is coarse threaded. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque metric bolts head and wrench sizes ansiso, din and jis bolts metric bolts minimum ultimate tensile and proof loads minimum ultimate tensile and proof loads for metric bolts with coarse or fine threads. Metric bolts maximum torque, in footpounds, for clean, dry threads check your shop manual bolt size low grade grade 8. The value for the friction coefficient provided by the.
Most accurate bolt torque calculator given its geometry and thread diameter, using vdi 2230 standard, screw clearance through the specific tool 3d model bolt torque calculator metric vdi 2230 bolt torque calculator metric. Torque conversion chart metric to english this printable torque conversion chart of newton meters to foot pounds is provided by. Fill, sign and download bolt torque chart online on. Nonstock items may vary due to variables in methods of manufacture. Determining the correct torque can however present problems. Torquetension relationship for astm a193a193m b7 and. Tightening torque chart for metric bolts hobbiesxstyle. It is a function of the materials it is a function of the materials frictional characteristics, which are based on surface finish, coatings and so on. May 20, 2017 torque conversion chart english to metric torque conversion chart of foot pounds to newton meters. These values are from the fastenall pdf or other web resources on metric bolts and fasteners.
Pocket guide to tightening technique this booklet provides an introduction to the technique of using threaded fasteners for assembling components, the application of power tools for the assembly and the influence of tool selection on the quality of the joint. Torque coefficienttorque coefficient between bolt and receptacle. Preload n property class to iso 8981 tightening torque nmproperty class. Accepted formulae relating torque and tension, based on many tests are. Clamp loads for grade c lock nuts equal 75% of the bolt proof loads specified for sae j429 grade 8, and astm a354 grade bd bolts.
Use of its content by anyone is the sole responsibility of that person and they assume all risk. Fasteners bolts, nuts and threaded rods torque, tension and loads. If you poke around the web you will see many different values for bolt torques. Clamp loads estimated as 75% of proof load for specified bolts. Extreme caution should be used when using a formula for torquetension relationships. Preload and tightening torques fine metric threads. Year engine displacement liters cc engine idvin cylinder head bolts main bearing bolts rod brearing bolts crankshaft damper bolts flywheel bolts manifold spark plugs lug nuts intake exhaust 1999. Besides using metric measurements, a metric bolt uses the distance between the threads rather than the thread pitch, used in. Nom diapitch nom size x pitch inch bolt torque table sae j429 and asme 574 metric bolt torque table iso 898. Bolt clamp loads imperial has made a concerted effort to provide accurate information in its catalog and on its web site, however imperial assumes no responsibility for the accuracy of the.
Where the proof load is not quoted in the specification this has been taken as 95% of the yield stress. Torque coefficient torque coefficient between bolt and receptacle. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Chrysler torque values are based on a kfactor of 0.
Torque steel grade sae 5 sae 8 socket head cap screws property class 8. Iso 724 metric threads dimensions of metric threads according iso 724. Tightening torque tightening torque tightening torque tightening torque the torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolts minimum ultimate tensile strength. Metric bolts head and wrench sizes ansiso, din and jis bolts. The following torque values are to be used on all fasteners unless otherwise. Choose from our selection of metric bolts, including over,800 products in a wide range of styles and sizes. It should be noted that these figures are based on the first tightening of single assemblies in isolation. Metric bolts minimum ultimate tensile and proof loads.
Metric hex bolt diameters and thread pitches bolt depot. Accepted formulae relating torque and tension,based on many tests are. Installation torque tables for noncritical applications hazel t. The torque values in table v have been calculated as noted in the footnotes, by using formulas from reference 3. Higher friction results in less conversion of torque to preload. Metric bolt grade mechanical requirements for carbon steel. These formulae may be used for bolts outside the range of the. The torque required for a 34 dry steel bolt to achieve this tension can be calculated as. Always refer to vehicle manufactures recommended torque setting for the specific application. Metric bolts tightening torques engineering toolbox. Torque settings suggested starting values the below estimated torque calculations are only offered as a guide. The values shown in the chart are to be used as a midrange guideline.
If lubrication is to be applied to the nutbolt, multiply the recommended torque by the appropriate factor shown in the table. The importance of correct bolt tightening cannot be over emphasized. Lubricate all contact areas of the bolts and washers. Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. The torque figures quoted have been based on a theoretical bolt load equal to 85% of the proof load of the bolting material. All material included in this chart is advisory only, and its use by anyone is voluntary. Because iso standard covers only sizes up to m 36, the din standard was subdivided into part 1 m 1.
Length is measured from under the head to the end of the bolt note. Tightening torque hex bolts the tightening torque values given in the above table serve only as a guide. Always replace shear bolts with identical property class. M p x d 5000 these formulae may be used for bolts outside the range of the tables, m torque lbf. There is no torque difference for fine or coarse threads. Bolt torque specs in foot pounds or inch pounds sizethread grade 5 grade 8 grade astma574 class tensile torque reference chart metric iso 898 inch sae j429 note.
Standard metric bolt dimensions and grades metric m8 1. Klock or kep a nut with an attached freespinning external tooth lock washer. Performance data listed are for standard production items only. Some of the many variables causing problems are the coefficient of friction between mating threads the coefficient of friction between the bolthead or nut and its mating surface. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque. Sizeunrc torque nm inch metric size nominal tightening torque nominal tightening torque size inpounds size nm 4 5 6 8 10 14 516 38 12 58 inchbutton head metricbutton head 815 30 65 125 200 360 1750 m3 x 0.
Castle castle nuts are used in conjunction with a cotter pin. There are several ways of securing parts and components to. Year engine displacement liters cc engine idvin cylinder head bolts main bearing bolts rod brearing bolts. Consider this size heres what the description means.
Do not use these values if a different torque value or tightening procedure is given for specific application. Printable torque conversion chart metric toenglish footpounds to newtonmeters. Installation torque tables for noncritical applications. Metric bolts grade grade a270 and a470 a280 and a480 recommended assembly torque recommended assembly torque to include 70% proof load to include 70% proof load nominal diameter nm ft lbf nm ft lbf. Improvised torque wrench improvised torque wrench with luggage scale. Tightening torque tightening torque tightening torque tightening torque the torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt s minimum ultimate tensile strength. Shear bolts are designed to fail under predetermined loads. Understanding metric fasteners fastener mart bolts. Determining the proper torque for a fastener is the biggest problem in fastener installation.
Metric torque chart for hex head cap screws torque chart for stainless steel cap screws size 316 i n c h188 i n c h. Fasteners the torquing of stainless steel fasteners your guarantee of quality industrial fasteners. Metric bolts minimum ultimate tensile and proof loads minimum ultimate tensile and proof loads for metric bolts. A similar table was published in product engineering by arthur korn around 1944.