You asked: How much torque can a Grade 5 bolt take?

How much torque can a bolt take?

US Recommended Bolt Torque

Size Recommended Torque
Grade 2 18-8 S/S
5/16″ 8 11.8
3/8″ 15 22
7/16″ 24 33

How do you calculate max torque on a bolt?

You may determine the maximum, or max, torque for a screw with the mathematical formula T = K x D x P. The formula’s “T” is the targeted torque for the screw measured in inch pounds.

What is the maximum torque on a 5/16 bolt?

ASTM A449 / SAE Grade 5*

Bolt Size TPI Tightening Torque (ft lbs)
516 18 17
38 16 31
716 14 49

How do you calculate bolt torque?


The general equation for bolt load based on applied torque is T = KFiDb where K = torque coefficient. K is a function of the coefficients of friction and collar friction in the joint, and these are based on variables such as surface finish, coatings, and so on.

What is a Grade 5 bolt?

Grade 5 Bolts and fasteners are made of medium strength carbon steel and are specified under the Society of Automotive Engineers (SAE). If your application calls for heavier materials, you may need Grade 8 Bolts because they are the hardest and are often used in heavy manufacturing applications.

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What are bolt grades?

The grade of a bolt determines the maximum amount of stress (tensile strength) that the bolt can handle. Tensile strength is the amount of pull the bolt can withstand before breaking. The method used for tightening the bolt is also dependent upon the grade of the bolt.

How do I know how much torque I need?

Torque is defined the length of the lever arm multiplied by the force applied. For instance, if you have a two-foot long bar and you hang a 10-pound weight from it, you have 20 foot/pounds of torque.

Does bolt length affect torque?

Tightening torque is not influenced by the bolt length so easy to standardize. The Bolt efficiency will be low due to wide tolerance of the tension.

How do you calculate maximum torque?

Torque on the loop can be found using τ=NIABsinθ τ = N I A B sin ⁡ . Maximum torque occurs when θ = 90º and sin θ = 1.

How strong is a Grade 8 bolt?

The nominal size of the grade 8 bolts can be from 1/4″ to 1 1/2″. The minimum yield strength of this grade bolt is 130,000 psi. A maximum of 120,000 psi of tensile force (proof load) can be applied to grade 8 bolts.

What is the torque on a Grade 8 bolt?

Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws

Coarse Thread Coarse Thread
5/16-24 (.3125) 3675 5/16-24 (.3125)
3/8-24 (.375) 5588 3/8-24 (.375)
7/16-20 (.4375) 7575 7/16-20 (.4375)

What is the torque on a 5’8 stud?

In general, 1/2-inch studs typically have a torque range of 75 to 85 foot pounds; 9/16-inch studs range from 135 to 145 foot pounds; 5/8-inch studs run from 190 to 210 foot pounds.

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Is torque and tension the same?

“Torque” is simply a measurement of the twisting force required to spin the nut up along the threads of a bolt, whereas “Tension” is the stretch or elongation of a bolt that provides the clamping force of a joint. … Torque wrenches provide this tension by the amount of rotational force they apply to the bolt.

What’s the unit for torque?

Unit of torque: newton metre (N m)

The quantity torque (or moment of force) may be thought of as the cross product of force and distance and the SI unit for torque is Newton metre, N m (m2 kg s2).

What does it mean to torque a bolt?

Torque is the amount of energy it takes to spin the nut up along the threads of a bolt. … So, as the nut is turned (torqued) along the threads beyond this point, the steel gets pinched together between each end of the bolt assembly causing the bolt to stretch: E-L-O-N-G-A-T-I-O-N.