Friday, July21, 2017 L-36.com

Bolt Torque Guide



Fastener Type Minimum
Tensile
Strength
Material PRODUCTION TORQUE GUIDE
Body size of Outside Diameter
2 3 4 5 6 8 10 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
Image1.jpg (1142 bytes) S.A.E 2 Steel 74000 P.S.I Low Carbon               6 12 20 32 47 69 96 155 206 310 480 675 900 1100
Image2.jpg (1317 bytes) S.A.E. 5 Steel 120000 P.S.I Medium Carbon Heat Treat               10 19 33 54 78 114 154 257 382 587 794 1105 1500 1775
Image3.jpg (1437 bytes) S.A.E. 7 Steel 133000 P.S.I. Medium Carbon Alloy               13 25 44 71 110 154 215 360 570 840 1325 1825 2500 3000
Image4.jpg (1482 bytes) S.A.E. 8 Steel 150000 P.S.I. Medium Carbon Alloy               14 29 47 78 119 169 230 380 600 900 1430 1975 2650 3200
Image5.jpg (1267 bytes) Socket Head
Cap Screw
160000 P.S.I. High Carbon Quenched Tempered               16 33 54 84 125 180 250 400 640 970 1520 2850 2130 3450
Image10.jpg (894 bytes) Socket Set
Screw
212000 P.S.I. High Carbon Quenched Tempered         9* 16* 30* 70* 140* 18 29 43 63 100 146            
Image8.jpg (1232 bytes) Machine Screw
Stainless
  18-8 2.6*  4* 5.5* 8* 10* 20* 23* 75* 132* 20 31 43 58 95 130 194 260 400 500   725
Image8.jpg (1232 bytes) Machine Screw
Stainless
  316 2.7* 4* 5.7* 8* 10* 22* 25* 80* 140* 22 34 46 60 100 135 210 280 425 515   750
Image7.jpg (1302 bytes) Machine Screw
Yellow Brass
60000 P.S.I. CU 63 ZN 37 2* 3.3* 4.4* 6.4* 8* 16* 20* 65* 110* 17 27 37 49 78 104 160 215 325 400   595
Image8.jpg (1232 bytes) Silicone Bronze
Type "B"
70000 P.S.I. CU 96 ZNI-5 Min. 2.3* 3.7* 4.9* 7.2* 10* 19* 22* 70* 125* 20 30 41 53 88 117 180 250 365 450   655
Image8.jpg (1232 bytes) Machine Screw
Aluminum
55000 P.S.I. CU 3.8-4.9 1.2-1.8 MN .3-.9 1.4* 2.1* 2.9* 4.3* 5.4* 12* 15* 46* 82* 13 20 27 36 62 83 128 170 255 315   460
Image8.jpg (1232 bytes) Machine Screw
Monel
82000 P.S.I. NI 67 CU 30 FE 1.4 2.5*                   4* 5.5* 8* 11* 21* 27* 87* 155* 23 36 50 67 115 155 235 315 475 585   850
Image8.jpg (1232 bytes) Sems Heat Treated Steel 120000 P.S.I. 1018 1022 4* 5* 7* 11* 15* 27* 37* 90* 200* 300*                      
Image11.jpg (1284 bytes) Studs Use SAE 2.5 and 8 values when grade is known, with nut of sufficient strength.

All figures are POUND FEET except those marked with an
ASTERISK ( * ) WHICH ARE pound inches.
These values are for lubricated fasteners.

Image12.jpg (1075 bytes) Tapping Screw Set up joint as it will be in production use 70% of over-torque failure as production specifications.

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.