Fluids Flow Engineering document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); G-Wizard Machinist's Calculator: Quick Reference, Sheet Metal Gauge Chart [ Updated for 2021 ], Fitting a Quick Change Tool Post to your Lathe [QCTP], Home Switch and CNC Limit Switch [Easy, Accurate and. Do not use Grade 9 in a suspension application or anywhere that high impacts are possible and could lead to a safety concern if it breaks instead of bends. In addition, we give the material the bolt is made from as well as its hardness range. 450 Typical, 500 Min. Power Transmission Tech. SAE bolt grades indicate the strength of the bolt. for end bolts: d = e1/(3d0) Structural Shapes The design resistance of a group of fasteners may be taken as the sum of the design bearing resistances, For preloaded bolted connections which are slip-resistant at the Serviceability Limit State or the Ultimate Limit State the corresponding shear load, According to EN1993-1-8 3.6.1(4) the design shear resistance, According to EN1993-1-8 Table 3.4 the bearing resistance, According to EN1993-1-8 3.6.1(12) where bolts transmitting load in shear and bearing pass through packing plates of total thickness, According to EN1993-1-8 3.8(1) for long joints where the distance between the centers of the end fasteners measured in the direction of load transfer is more than 15, According to EN1993-1-8 Table 3.4 for countersunk bolts the tension resistance. These have high torque capacities with high tensile strength ranging above 500MPa. Grade 8.8 Bolts per. The charts below show the ideal tightening torque for each bolt grade for a variety of sizes. Grade 8 bolts are manufactured in different materials, thread types, lengths, coatings, and classes of fit, so it is critical that all those factors are taken into account when choosing the type of Grade 8 bolt is best. The tension capacity of the bolt is given by: The shear capacity of the bolt is given by. End distance equal to 2 x bolt diameter, Thickness in mm of material passed through, The tensile stress area (At ) is obtained from standards. The design shear resistance of bolts Fv,Rd as given in EN1993-1-8 Table 3.4 is only valid when the bolt is used in holes with nominal clearance not exceeding the values given in the standard EN 1090-2 'Requirements for the execution of steel structures', as specified in EN1993-1-8 3.6.1(4). Max. Thus, for the bolt of property class 8,8 in the above example a nut of property class 8 is required. The difference between a gr8 bolt and gr8 hex cap screw is technically tolerance, in which hex cap screws have a tighter tolerance. The grading indicates the material strength of the bolt. Come join the discussion about performance, racing, conversions, modifications, troubleshooting and drivetrain. JavaScript is disabled. Bolt Grade Markings & Strength Chart - Inch Steel Bolts, Medium carbon steel or carbon steel with additives, quenched and tempered, Low or medium carbon steel, quenched and tempered, Low carbon Boron steel, quenched and tempered, Medium carbon / alloy steel with additives, quenched and tempered, Bolts, Screws and Studs (General Engineering), Medium carbon steel, quenched and tempered, Low carbon Martensitic steel, quenched and tempered, Atmospheric corrosion-resistant steel, quenched and tempered, Medium carbon alloy steel, quenched and tempered. Strength of Materials Under torqued bolts can quickly come loose, and over-torqued bolts are liable to break. We use cookies to deliver the best possible user experience and to collect anonymous statistical data about our web traffic. Save my name, email, and website in this browser for the next time I comment. This field is for validation purposes and should be left unchanged. Bearing values assume standard clearance holes. Nut Compatibility ChartMaterial Specifications. Section Properties Apps