3 4 Bolt Torque Value

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3 4 bolt torque value.

Accepted formulae relating torque and tension based on many tests are. M p x d m torque n m 5000 p bolt tension newtons d bolt dia. Fine thread figures are for 1 14. Recommended bolt torque values for stainless steel and nonferrous fasteners inch series.

Torque values stainless steel bolt table chart. Sae 0 1 2 74 000 psi low carbon steel. Torque tension reference guide printed in u s a. Values calculated using industry accepted formula t kdp where t torque k torque coefficient dimensionless d nominal diameter inches p bolt clamp load lb.

Mm these formulae may be used for bolts outside the range of the tables overleaf. 3 4 125 138 200 223 282 315 128 124 104 102 118 115 7 8 129 144 322 355 454 501 194 193 178 178 159 158 1 188 210 483 541 682 764 287 289 265 240 235 212 sizes from 4 to 10 are in in lbs. Ansi hardware design guide design torque and force calculations. Sae grade 5 120 000 psi med.

Pressure wax as supplied on high strength nuts 10 hot dip galvanized 25 and plain non plated bolts as received 20. T dry 0 2 20000 lb 0 75 in 1 12 ft in 1 0 100 250 lb f ft example required torque for tightening a metric bolt to proof load. Sae grade 3 100 000 psi med carbon steel. 9702365 as 06 14 torque poster.

3 4 10 9030 85 96 113 21322 160 200 227 267 30101 226 282 320 376 35281 265 331 375 441. In addition a proper bolt torque value can be inconsistent from fastener to fastener due to several factors including variations in material coatings surface finishes fit tolerances installation method etc. Grade 2 5 and 8 values are for plated bolts. M p x d m torque lbf ft 60 p bolt tension lbf d bolt dia ins or for metric sizes.

The following torque values are suggested maximums based upon actual lab testing on clean and dry or near dry fasteners. Sizes from 1 4 up are in ft lbs. For these reasons it is not practical to provide a single bolt torque chart or formula that is accurate for all situations. The proof load for a m30 metric bolt grad 8 8 is 337000 n.

Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3. The torque required for a 3 4 dry steel bolt with 0 lubrication to achieve this tension can be calculated as.