7 8 Bolt Torque Grade 8

For longer fasteners the torque is reduced significantly.

7 8 bolt torque grade 8.

7 8 9 cap screws hex bolts. Torque tolerance 0 15 of torquing values. Grade 2 grade 5 grade 8 18 8 s s bronze brass. The hex head cap screw is a common fastener in construction and machine assembly.

Unless otherwise specified use torque values listed above. Sae grade 7 133 000 psi. These figures represent an estimate of torque torque being the measurement of friction not tension required to induce given preload clamp load in a bolt. 5 8 8 8 10 9 class 5 8 class 8 8 class bolt head identification bolt size grade 2 grade 5 grade 8 metric bolt head identification bolt size inches.

Extreme caution should be used when using a formula for torque tension relationships. Under over tightening of fasteners can result in costly equipment failure or personal injury. Grade 5 8 9 bolts locknut size threads per inch steel hex locknut steel hex flange nut grade c fnl grade 9 grade f grade g clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening torque. Print this page.

Re use of original used spring u bolts is not recommended due to fatigue and stretching when u bolt was originally torqued. Leaf spring u bolts are available from grade 5 u bolts to grade 8 u bolts. Us recommended bolt torque. Sae grade 6 133 000 psi med.

Rev 3 6 09 torque tension relationship for a307a grade 5 8 9 bolts in sq. Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3 6 9 6 8 9. Grade 2 calculations only cover fasteners 1 4 3 4 in diameter up to 6 long. Leaf spring u bolt kits for heavy trucks medium and light duty trucks and auto applications.

Tightening torque guide for grade 5 8 hex cap screws this table is based on ifi 5th edition technical data n 12 n 16 using equation 1 and a torque coefficient k 0 20 for non plated steel fasteners and k 0 15 for plated fasteners. 7 8 14 32479 284 355 403 474 45853 401 502 568 669 53743 470 588 666 784. Sae 0 1 2 74 000 psi low carbon steel. Hex head cap screws are typically used to create a bolted joint in which a threaded.

Sae grade 5 120 000 psi med. In lbs lbs lbs lbs. Clamp loads are based on 75 of the minimum proof loads for each grade and size. Torque is only an indirect indication of tension.

7 8 129 144 322 355 454 501 194 193 178 178 159 158. Sae grade 3 100 000 psi med carbon steel.