FASTENER TORQUE CHARTS

1 Phone: 1-800-558-2808 Fax: 1-800-553-8769 FASTENER TORQUE CHARTSI mperial has made a concerted effort to provide accurate information in its catalog and on its web site, however imperial assumes no responsibility for the accuracy of the information. All information published by imperial in its catalog, marketing literature, and on its web site is provided "as is" without warranty, expressed or implied. imperial and its vendors disclaim all warranties, expressed or implied including, without limitation, warranties of merchandise and fitness for a particular z eCl a S SNe w t oN Me t e rSFo o t Po uN d S (a P P r o x.)Cl a S S iM a g ezi N C Pl a t e duN Pl a t e dzi N C Pl a t e duN Pl a t e dM4 x .70 x .80 x x x x x x x x x x x x x x x x x x x x x x x TORQUE chart fOR HEX HEAD CAP SCREWSTORQUE chart fOR STAInlESS STEEl CAP SCREWSSi z e316 i N Ch-l b18/8 i N Ch-l , , , , , , , , , , , , "-83, , "-143, , fOR PREVAIlInG- TORQUE lOCK nUT ASSEMBlY TORQUES (CAD AnD WAX, GRADE B, C, AnD GRADE G flAnGE nUTS) lOCK nUT STAnDARDS fROM IfI-100 REQUIREMEnTSTorque-Tension RequirementsSi z egrade bgrade Cgrade gCl a M P lo a daS S e M b l y to r q u eCl a M P lo a daS S e M b l y to r q u eCl a M P lo a daS S e M b l y to r q u eth r e a dS Pe r iN Ch(l b)Ma x.

2 Mi N.(l b)Ma N.(l b)Ma 202,00085**60**2,850125**85**2,850150**1 00**1/4 282,30090**65**3,250125**85**3,250160**1 05**5/16 183,350150**110**4,700190**130**4,700240 **155**5/16 243,700160**120**5,200200**140**5,200230 **155**3/8 164, ,95028206,95032213/8 245,60022167,90029217,90033227/16 146,80032239,60043319,60051347/16 207,550342410,700433110,70060401/2 139,050503712, ,80085551/2 2010, ,440705014,44089599/16 1211,600705016,400957016,400120809/16 1813, ,300957018,300132885/8 1114,500957020, ,300143955/8 1816, ,0001259023,0001751153/4 1021,30016512530,10021015530,1002401603/ 4 1623,80016512033,60021015533,6002701707/ 8 929,50025018541, ,6003602607/8 1432,40027020045, ,8004022471 838,70037527554, ,6005304101 1242,30039529059,75049036059,750 1 1443,00040030061, ,1006453981-1/8 742,10040429469,00058545469,000 1-1/8 1247,50043732776,80062245376,800 1-1/4 753,50051337587,00073657387,000 1-1/4 1259,70054941296,60078257096,600 1-3/8 663,800612445104,000880685104.

3 000 1-3/8 1272,900670503118,000955696118,000 1-1/2 677,600745545127,0001,075837127,000 1-1/2 1287,700807605142,0001,150837142,000 Clamp loads for the Grade B lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 5, and ASTM A-449 bolts. Clamp loads for Grade C lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. IFI-100 does not govern lock nuts above 1". The values shown in the chart are to be used as a mid-range guideline.** TORQUE values for 1/4" and 5/16" sizes are in inch lb. All other TORQUE values are in foot CGrade BGrade GPhone: 1-800-558-2808 Fax: 1-800-553-8769 BOLT CLAMP LOADSI mperial has made a concerted effort to provide accurate information in its catalog and on its web site, however imperial assumes no responsibility for the accuracy of the information. All information published by imperial in its catalog, marketing literature, and on its web site is provided "as is" without warranty, expressed or implied.

4 imperial and its vendors disclaim all warranties, expressed or implied including, without limitation, warranties of merchandise and fitness for a particular :The above recommended assembly torques are offered as a guide only. TORQUE specifications, especially for critical joints, should be determined under actual assembly conditions due to the many variables involved which are difficult to predict and do affect the TORQUE -tension above recommended clamp loads are based on 75% of the minimum specified proof loads for each grade and a M e t e r & th r e a dS Pe r iN Ch1/4-201/4-285/16-185/16-243/8-163/8-24 7/16-147/16 201/2-131/2-209/16-129/16-185/8-115/8-18 3/4-103/4-167/8-97/8 141-81-14uSS/Sae grade 5te N Si l eSt r eN g t hMi N. PsiPr o oFlo a dLBCl a M Plo a dLBto r q u edr yFt LBlu b r iC a t e dFt LB120,0002,7002, ,0003,1002, ,0004,4503,3401713120,0004,9003,70019141 20,0006,6004,9503023120,0007,4505,600352 5120,0009,0506,7805035120,00010,1007,570 5540120,00012,1009,0507555120,00013,6001 0,2008565120,00015,50011,60011080120,000 17,30012,95012090120,00019,20014,4001501 10120,00021,80016,350170130120,00028,400 21,300260200120,00031,70023,780300220120 ,00039,30029,450430320120,00043,30032,45 0470350120,00051,50038,600640480120,0005 7,70043,300720540uSS/ Sae grade 8te N Si l e St r eN g t hMi N.

5 PsiPr o oFlo a dLBCl a M Plo a dLBto r q u edr yFt LBlu b r iC a t e d Ft LB150,0003,8002,850129150,0004,3503,2501 410150,0006,3004,7002418150,0006,9505,20 02720150,0009,3006,9804535150,00010,5007 ,9005035150,00012,8009,5507050150,00014, 20010,6508060150,00017,00012,75011080150 ,00019,20014,40012090150,00021,80016,350 150110150,00024,40018,250170130150,00027 ,10020,350210160150,00030,70023,00024018 0150,00040,10030,100380280150,00044,8003 3,500420310150,00055,40041,600600450150, 00061,10045,800670500150,00072,70054,500 910680150,00081,50061,1001,020760 Torques for Grades 5 and 8 were calculated based on the following relationship:T = R D PWhere:T = TORQUE (ft lb)D = Nominal Diameter (in)P = Clamp Load (lb)R = Tightening CoefficientThe value of R is assumed to be equal to .20 for dry, unplated conditions and equal to .15 for lubricated, including plated, conditions. Actual values of R can vary between .05 and .35 for commonly encountered ASSEMBlY TORQUE VAlUESWhen using anti-seize, reduce the lubed chart reading by 20% to properly lubricate and use lubed TORQUE r eN g t h gr a d eaP P l i C a b l e Si z eSPr o oF lo a d St r eS S (P S i)yi e l d St r eN g t h Mi N.

6 St r eS S (P S i)te N Si l e St r eS S Mi N. (P S i)SAE Gr. 51/4 to 1" dia. 1" dia. to 1-1/2 ,00074,00092,00081,000120,000105,000 SAE Gr. 81/4 to 1" ,000130,000150,000 Pounds to Inch Pound Conversionlb x 12 = inch lbExample: 9 lb x 12 = 108 inch lbFr aC t i oN a l Me a S u r eM e N tbo l t di a M e t e rCa P SC r e w wr e N Ch Si z eNu t wr e N Ch Si z e1/47/167/165/161/21/23/89/169/167/165/8 11/161/23/43/49/1613/167/85/815/1615/163 /41-1/81-1/87/81-5/161-5/161"1-1/21-1/21 -1/81-11/161-11/16Fr aC t i oN a l Me a S u r eM e N tbo l t di a M e t e rCa P SC r e w wr e N Ch Si z eNu t wr e N Ch Si z e1-1/41-7/81-7/81-3/82-1/162-1/161-1/22- 1/42-1/41-3/42-5/82-5/82"3"3"2-1/43-3/83 -3/82-1/23-3/43-3/42-3/44-1/84-1/83"4-1/ 24-1/2