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Use Prevailing Torque All-Metal Nut chart if using this style of nut. = Nominal Diameter. = Clamp Load For J429 Grade 5 and 8, FNL Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. For A307 Grade A, 75% of 36,000 PSI is utilized.
These metric bolt torque charts show the ideal tightening torque for class 8.8, 10.9, and 12.9 bolts for both wet and dry tightening. The bolt’s class indicates its material strength, with higher numbers meaning higher tensile and yield strength.
Due to many variables that affect the torque-tension relationship like human error, surface texture, and lubrication the only way to determine the correct torque is through experimentation under actual joint and assembly conditions. A307. Grade 2. A325.
12 sie 2024 · Screw and Bolt Torque Table for Standard Threads. The recommended tightening torques below are a great starting point for figuring out how much torque you need.
The following table shows the tightening torque for metric thread fasteners. In the List metric bolt torque chart you find the metric torque unit in Nm and ft lbs. You can also made an conversion from the unit Nm to ft lbs and also from ft lbs to Nm.
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. Clamp load calculated as 75% of the proof load when specified by the standard. Torque values calculated from formula T=KDF, where.
Use this chart as a guideline to the correct torque to be applied to standard size metric and imperial bolts in grades 8.8 (metric) and ASTM A193 grade B7 (imperial) or similar.
