Transcription of Torque-Tension Relationship for Metric Fasteners
1 Caution: All material included in this chart is advisory only, and its use by anyone is voluntary. In developing this information, Fastenal has made a determined effort to present its contents accurately. Extreme caution should be used when using a formula for torque / tension relationships. torque is only an indirect indication of tension . Under/over tightening of Fasteners can result in costly equipment failure or personal injury. Rev 3-4-09 Torque-Tension Relationship for Metric Fasteners Cla mpClampC lampClampLoadLubrica ted Zinc Plat ed Pla in&DryLoa dLub ricated Zinc Plat ed Plain &DryL oadLubrica ted Zinc Plat ed Pla in&DryLoadL ubricated As-ReceivedPlain&Dry(lbs)(ft-lb s)(f t-lbs)(ft -lbs)(lbs)(ft-lb s)(f t-lbs)(ft -lbs)(lbs)(ft-lb s)(ft -lbs)(ft-lbs)(lbs)(ft-lbs)(ft-lbs)(ft-lb s) .98581 . 2282.
2 83 .23..8138 73 . 9854. 76 .57. 6617632..0196 85 . 8168. 07110953..0282 29 ..3358 78181.. 362153201211371612192417319623025 386188221671892222693423927031831 6195376097162431337215817921134471407461 5434932958266077757 6496817719082731742823226230944924597676 79664288854968113 975 13299811311 79784481 1581312154 491 6801 35315341 24814 68970551 5761786210 11134251 84220872 455364309825496227327986614151 60318 8611 42912 024229426991335692 36626813 154 Class ss ss 1 Dia . (mm)PitchTig htening TorqueTightenin g TorqueTig hten ing TorqueTightening 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. Clamp loads estimated as 75% of proof load for specified bolts. torque values listed in foot-pounds.
3 torque values calculated from formula T=KDF where; K= for "lubricated" condition, K= for zinc plated and dry condition (or as-received for the ), K= for plain and dry condition
