Bolt Torque Chart

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Bolt Torque Chart. Grade 5 unc recommended assembly torque. This website covers technical aspects of the original astm a325 specification which was withdrawn by astm international in 2016 and replaced by astm f3125.

10 Bolt Torque Chart Templates Free Samples , Examples
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The torque values can only be achieved if nut (or tapped hole) has a proof load greater than or equal to the bolt's minimum ultimate tensile strength. Torque has been converted into ft/lbs by dividing the result of the formula by 12. The published torque values do not include the rotational drag of the elastic stop nuts (an365).

Standard Maintenance Practice Dictates That Mechanics Add This Value To The Specified Torque.

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Grade 2, 5, And 8 Values Are For Plated Bolts.

Proof load is 105,000 psi. Clamp loads are based on 75% of the minimum proof loads for each. The charts below show the ideal tightening torque for each bolt grade for a variety of sizes.

The Bolt’s Class Indicates Its Material Strength, With Higher Numbers Meaning Higher Tensile And Yield Strength.

Based on using weldneck flanges & lubricated stud bolts with a 0.15 friction factor.*** rec. Bolt torque charts these charts show suggested maximum torque values for threaded products and are intended only as a guide. Torque has been converted into ft/lbs by dividing the result of the formula by 12.

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Sae grade 3 100,000 psi. Astm a325 powered by portland bolt. Tensile strength (min psi) of all grade 8 bolts is 150,000 psi.

Class 4.6 Recommended Assembly Torque.

The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%, and 100% of the torque value. All calculations are for coarse thread series (unc). ** torque values for 1/4 and.

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