Pre-load and Tightening torques for steel fasteners - Standard Metric Threads

Maximum Pre-load (N) Property class to ISO898/1Maximum Tightening Torque (Ncm) Property class to ISO898/1
ThreadCoeff of friction3.64.65.6 4.85.88.810.912.93.64.65.6 4.85.88.810.912.9Conv factor
M1.60.1001852002503335758109704.55.06.58.51521250.026
0.1251751902403105447709205.05.57.59.51724290.031
0.1401651802303005307468956.56.08.010.01825300.034
M1.80.10022023029538068099511505.506.08.010.018.526.032.00.027
0.12520522028036064590510906.57.09.511.521.030.036.00.033
0.14020021527535062588010507.007.5010.012.513.032.038.00.036
M2.00.100310335420540960135016209.510.513.517.031.044.052.00.032
0.1252953204005209101280153011.512.015.519.035.050.060.00.039
0.1402853053855008801240149012.013.016.521.538.053.064.00.043
M2.50.10051556070091016002250270020.021.028.036.063.089.01070.040
0.12549053066586015202140256023.025.032.039.073.01021230.048
0.14047551064583014702070248025.027.034.043.078.01091310.053
M3.00.1007908551070139024403430412035.038.049.063.01111571880.046
0.1257708151020132023203270392042.044.056.072.01281802150.055
0.140730785985128022503170380044.047.060.078.01371922300.061
M3.50.100105011401430185032704600552054.059.075.096.01712402900.052
0.125100010801360176031204380526063.068.086.01101962753300.063
0.14097010501320171030204250510067.073.092.01192102953950.070
M4.00.100137014801850240042305960714083.088.01121442553604300.060
0.125130014001760228040205660679094.01021281662904104950.073
0.14012601360171022203900548065801001081371773104405250.080
M5.00.100225024103020392069109720116501601702202805007058450.072
0.125214023002880374065809260111001802002503205758109700.087
0.1402000223027903620638089801080019021027034061586510400.096

M6

Maximum Pre-load (N) Property class to ISO898/1Maximum Tightening Torque (Nm) Property class to ISO898/1
M60.1003200340042705550976013700164502.83.03.84.88.61214.50.00087
0.1253.50324040605270929013050156503.23.44.35.69.914.016.50.00106
0.1402960135039405120901012650152003.53.74.66.010.515.018.00.00117

M8

M80.1005877062607830101701790025200302006.87.29.111.721.029.035.00.00115
0.12555905960746096901705024000288007.98.310.513.624.034.040.00.0014
0.14054205780723093901655023200279008.48.911.014.526.036.043.00.00145

M10

M100.10093509960124501618028500401004810013.514.418.023.442.058.070.00.00175
0.12589009480118501540027100382004580015.516.621.027.048.067.081.00.00195
0.14086409200115001490026300370004440017.018.022.029.051.072.087.00.00175

M12

M120.1001360014520181502350041500584007000024.025.031.041.072.01011210.0021
0.1251300013840173002240039600556006680027.029.036.047.083.01171400.0023
0.1401260013400168002180038400540006480029.031.039.050.089.01251500.002

M14

M140.1001870019900249003230057000801009620037.040.050.047.01141601930.0024
0.1251780019000238003090054300764009170043.046.058.074.01321852200.0027
0.140173001840023100300052700741008900046.050.062.081.01411982400.0022

M16

M160.100257002740034300445007830011000013200057.060.076.098.01742452950.0027
0.125245002610032700425007470010500012600066.070.088.01152002853400.003
0.140238002530031700412007260010200012250071.076.095.01242153053650.0025

M18

M180.100313003330041700542009530013400016100079.083.01051352403404050.003
0.125298003170039700516009090012800015350091.095.01211552753904700.0034
0.14028900308003860050100882008820014900097.01051301712954205000.0028

M20

M200.100402004280053500695001225001720002060001111201481953404755700.0033
0.12538300408005110664001170001640001970001281351702193905506600.0037
0.1403720039600496006640011350015900019150001381461842384205907100.0033

M22

M220.100501005340066800868001530002150002580001491601992604556407650.0036
0.125479005100063800829001460002050002460001731832302985307458900.004
0.140465004960062000806001420001995002395001861982503225708009600.0033

M24

M240.1005780061600771001002001760002480002970001912032553305808209800.004
0.1255520058800736009568016800023600028400022023529538267595011400.0044
0.14053600571007140092800163500230000276500235251315408725102012200.0037

M27

M270.17600081200101500131900323000326000391000280300375488855121014500.0045
0.125726007740096800125800221000311000374000325348435566995140016800.005
0.147060075200941001223002150003020003630003503764706101070151018100.0041

M30

M300.192500988001235001605002820003960004750003804055106581160164019700.005
0.1258830094001175001627002690003780004540004454705907631350190022800.0055
0.1485700916001145001488002610003670004410004755046358181450205024500.0045

M33

M330.11150001228001535001995003510009490005920005155526908981570221026500.0055
0.12511000011720014650019040033500047200056600060064580010451830258030900.006
0.1410700011400014250018520032600045800055000064568586511101970277033300.0049

M36

M360.113500014400018000023400041200057900069500066570588511452030285034200.006
0.125129000137600172000223600394000553000664000775825103013402360331039800.0066
0.14125500134000167500217700382000538000645000830885111114352530356042800.0053

M39

M390.1162500173500217000282100495000696000835000860920115014952620368044200.0053
0.12515500016560020700026910047300066500079800010001075134017503050429051500.0065
0.1415100016080020100026130046000064600077600010801155144018803290462055500.0072

For the Threaded Fastener calculation procedure, see VDI 2230 guidelines

Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.