3 8 Grade 8 Bolt Torque

Under over tightening of fasteners can result in costly equipment failure or personal injury.

3 8 grade 8 bolt torque.

Sae grade 3 100 000 psi med carbon steel. Sae grade 7 133 000 psi. Leaf spring u bolts are available from grade 5 u bolts to grade 8 u bolts. Sae grade 5 120 000 psi med.

Sae 0 1 2 74 000 psi low carbon steel. Torque has been converted into ft lbs by dividing the result of the formula by 12. Sae 0 1 2 74 000 psi low carbon steel. Recommended bolt torque table size recommended torque grade 2 grade 5 grade 8 18 8 s s bronze brass coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3 6 9 6 8 9 7 9 8 19 8 18 4 16 2 10 22 8 31 7 21 2 29 3 18 6 25 9.

Extreme caution should be used when using a formula for torque tension relationships. 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. Torque tolerance 0 15 of torquing values. 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.

Grade 2 grade 5 grade 8 18 8 s s bronze brass. 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. Sae grade 5 120 000 psi med. Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3.

We supply round u bolts square u bolts and semi round u bolt kits complete. Leaf spring u bolt kits for heavy trucks medium and light duty trucks and auto applications. Sae grade 6 133 000 psi med. Torque is only an indirect indication of tension.

In lbs lbs lbs lbs. Grade 2 calculations only cover fasteners. Re use of original used spring u bolts is not recommended due to fatigue and stretching when u bolt was originally torqued. 1 3 8 12 72967 1003 1254 1421 1672 118324 1627 2034 2305 2712 138686 1907 2384 2701 3278 1 1 2 12 87747 1316 1645 1865 2194 142292 2134 2668 3024 3557 166778 2502 3127 3544 4169 torque tension relationship for a307a grade 5 8 9 bolts.

Sae j429 grade 8 bolts do not exceed 1 1 2 diameter. Rev 3 6 09 torque tension relationship for a307a grade 5 8 9 bolts in sq. And plain non plated bolts as received 20.