Torque Values Stainless Steel Bolt Table Chart. 48 ft-lbs. © Copyright 2000 - 2020, by Engineers Edge, LLC www.engineersedge.com All rights reserved Torque Values for A2 or A4 Metric Stainless Steel Fasteners. GD&T Training Geometric Dimensioning Tolerancing Engineering Videos Excel App. document.write('
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'); Because of the many interrelated variables that directly or indirectly Torque Tightening Values for Structural Steel Bolts Below is a list of the recommended tightening torques for 12.9 / 10.9 / 8.8 zinc plated finish bolts. The following suggested tightening torques provide an excellent starting point for determining torque requirements. ga('create', 'UA-6310447-1', 'auto'); (ft. The following suggested tightening torques provide an excellent starting point for determining torque requirements. Torque values are not given for martensitic stainless steel (C1, C3, C4) or ferritic stainless steel (F1) grades. UN8 Thread Series Caution: Stainless steel fasteners tend to gall, especially with long run downs, prevailing torque fasteners, impact drivers, and lack of lubrication. Advertising (or bolts, if bolt is torqued) having a width across flats of approximately determined. Minimum breaking torque (M b,min) for austenitic stainless steel bolts and screws between M 1.6 and M 16 (course threads) are shown in table 4 of EN ISO 3506-1:1997. The following torque values are suggested maximums based upon actual lab testing on clean and dry or near dry fasteners. Related Topics . Conversion Calculator. Torque values calculated from formula T=KDF, where Lubricated Clamp Load F based on 75% of Yield Dry Clamp Load F based on 40% of Yield to avoid Galling. else Date/Time: Maximum Recommended Tightening Torques Tightening torques for stainless steel bolts Introduction. Advertising Torque Remember, you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication. ). (ft. in a bolt for non-critical applications only. Training Online Engineering Engineering Forum 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.