What is the torque for a 8mm bolt?

Asked By: Simy Janoch | Last Updated: 26th April, 2020
Category: automotive motorcycles
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Metric Recommended Bolt Torque
Bolt Diameter (mm) Recommended Torque (Nm)
Class 8.8 Class 10.9
6 12 16
8 30 40
10 55 75

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Similarly, you may ask, how much torque can an m8 bolt take?

Always use a torque wrench when installing parts on your car!

Bolt Size 8.8 10.9
6mm (M6) 9Nm 13Nm
8mm (M8) 23Nm 33Nm
10mm (M10) 45Nm 65Nm
12mm (M12) 80Nm 115Nm

Subsequently, question is, what is the torque value of a bolt? US Recommended Bolt Torque

Size Recommended Torque
Grade 2
7/8" 129 144
1"† 188 210
* Sizes from #4 to #10 are in lb-in. Sizes from 1/4" up are in lb-ft. † Fine thread figures are for 1"-14. Grade 2, 5, and 8 values are for slightly lubricated bolts.

Additionally, what is the torque for 5/8 bolt?

Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws

GRADE 5
Coarse Thread
9/16-12 (.5625) 11625 82 ft lbs.
5/8-11 (.625) 14400 112 ft lbs.
3/4-10 (.750) 21300 200 ft lbs.

What is the torque for a 6mm bolt?

Metric Bolts Maximum Torque, in foot-pounds, for clean, dry threads Check your Shop Manual !

Bolt size Low Grade Grade 8.8
6mm 3-5 7
8mm 8-12 17
10mm 15-22 33
12mm 39 59

28 Related Question Answers Found

What is the tightening torque?

What is Torque Tightening? The application of preload to a fastener by the turning of the fastener's nut. Friction points should always be lubricated when using the torque tightening method. Torque Tightening and Preload. The amount of preload created when torquing is largely dependant on the effects of friction.

What is Nm torque?

The newton metre (also newton-metre, symbol N⋅m, N m) is a unit of torque (also called moment) in the SI system. One newton metre is equal to the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long. The nonstandard symbol Nm occurs in some fields.

What is the torque for m24 bolt?

Classic 8.8 Bolts (Metric Coarse)
Bolt Diameter x Pitch Thread Stress Area mm 2 *When μ = 0.14 Results in:
Tightening Torque Nm
M20 x 2.5 245 464
M22 x 2.5 302 634
M24 x 3 353 798

What is a Class 8.8 bolt?

Metric Grade 8.8 Bolts. Have AQuestion. Grade 8.8 Bolts are manufactured using medium carbon steel that has been quenched and tempered. Used in railroad equipment, motors, engines and processing equipment, grade 8.8 bolts exhibit good tensile strength and perform well in most environments.

How is tightening torque of a bolt calculated?


Axial Force Ff, by using Equation(1) Ff=0.7× y×As 0.7×112×20.1 1576[kgf] A bolt is tightened by torque, torque inclination, rotating angle, stretch measurement and other methods. The torque method is widely used due to its simplicity and convenience.

How do you measure bolt size?

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.

How is bolt torque measured?

Measuring method Loosen the bolt using a torque wrench and read the torque when the bolt starts moving. T i g h t e n t h e bolt further to determine the applied torque. Read the torque when the bolt starts moving again.

How do you calculate torque specs?

Calculate Torque
  1. Fill your values into the equation T = K x U x D x P.
  2. Solve the equation T = 1.33 times 0.20 times 0.50 inches times 13,927 lb. The total is 1,852 inches lbs.RE. Reduce the value into ft-lb. You can do this by dividing your value by 12, the number of inches in a foot.

What size Bolt uses a 3/4 wrench?

US Bolt Head/Wrench Size
Bolt Diameter Head and Wrench Size
Hex Bolt - Lag Bolt - Square Bolt Heavy Hex Bolt
3/8" 9/16" -
7/16" 5/8" -
1/2" 3/4" 7/8"

What is torque value?


Torque is the result of multiplying the value of Force applied by the Distance from the point of application.

What is the torque for 1/2 bolt?

ASTM A449 / SAE Grade 5*
Bolt Size TPI Tightening Torque (ft lbs)
Plain
716 14 49
12 13 75
916 12 109

What is the difference between Grade 5 and Grade 8 bolts?

Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head. Grade G is roughly equivalent to Grade 8.

What does torquing a bolt do?

Torque is used to create tension. Bolts are used to affix two components so that they can resist tensile (pulling apart) and shearing (sliding apart) forces. After the nut has been turned onto the bolt, additional torque causes the nut to turn and stretch the bolt.

What are the different grades of bolts?

The most common grading system used for bolts in the U.S. is the SAE system, but you can find metric grading systems as well. There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength.

Can you reuse bolts that have been torqued?


However, because the tightening procedure does permanently stretch the bolt, there is some risk of breakage if the bolt is reused. And since there is no way to tell how many times a bolt has been reused, it doesn't make any sense to reused TTY bolts – the risk far outweighs the replacement cost of used bolts.

Does thread pitch affect torque?

Thread pitch tends to be more independent of nominal diameter than the other variables. Increasing just thread pitch by 40% cuts tension 5% for a given torque. However, the reaction-torque term containing the thread pitch, P — P/2 π — does not contain a friction coefficient.

What do you mean by torque?

Torque is a twisting or turning force that tends to cause rotation around an axis, which might be a center of mass or a fixed point. Torque is sometimes confused with work, which is defined as force applied over a distance. However, torsion (twisting) is integral to the definition of torque.