# What is torque specs for bolts?

## What is torque specs for bolts?

US Recommended Bolt Torque

Size | Recommended Torque | |
---|---|---|

Grade 2 | Grade 8 | |

7/8″ | 129 | 501 |

1″† | 188 | 764 |

* 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. |

**What is the torque on a 10.9 bolt?**

Metric Recommended Bolt Torque

Bolt Diameter (mm) | Recommended Torque (Nm) | |
---|---|---|

Class 8.8 | Class 10.9 | |

10 | 55 | 75 |

12 | 100 | 135 |

14 | 160 | 215 |

**What is the torque on a 6 mm bolt?**

Typical maximum recommended thightening torques for metric bolts

Size (mm) | Typical Maximum Tightening Torque (Nm) | |
---|---|---|

Property Class | ||

M5 | 7.0 | 10.0 |

M6 | 11.8 | 17.0 |

M8 | 28.8 | 41.3 |

### What should the torque be on a bolt?

Bolt Torque Charts These charts show suggested maximum torque values for threaded products and are intended only as a guide. Always refer to the manufacturers recommended torque values if possible. CDI Torque Products is not responsible for any application of torque or it’s consequences as a result of using this chart. Use at your own risk!

**How much torque does a SAE grade 2 Bolt have?**

SAE Grade 2 Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs) Galv+Waxed Galv Plain 1 ⁄ 4 20 1,750 1,313 7 5 ⁄ 16 18 2,900 2,175 14 3 ⁄ 8 16 4,250 3,188 25

**What should the torque be on a CDI bolt?**

Bolt Torque Specifications These charts show suggested maximum torque values for threaded products and are intended only as a guide. Always refer to the manufacturers recommended torque values if possible. CDI Torque Products is not responsible for any application of torque or it’s consequences as a result of using this chart.

#### What are the tightening torques for Imperial bolts?

The tightening torques below are for imperial US bolts with tension approximately 70% of yield strength. The values are for slightly lubricated bolts. For dry bolts increase the torques with approximately 30%. Sorry to see that you are blocking ads on The Engineering ToolBox!

**What are the torque specifications for a metric bolt?**

Metric Bolt Torque. If the bolt diameter is 5 mm, thread series is Coarse, ISO 898-1 Property Class is 8.8, then. Torque for Ecoguard Bolt is 4.0 Nm, Lubricated is 4.6 Nm and dry is 6.2 Nm.

**What are the torque requirements for bolts?**

The required bolt clamping force for a joint is 20000 lbs. The torque required for a 3/4″ dry steel bolt to achieve this tension can be calculated as. T dry = (0.2) (20000 lb) (0.75 in) = 3000 (in lb)

## How do you calculate bolt tension?

Determine the tension force on the bolt. This can also be measured using a force transducer (again, if the value is not already known). Assume the tension force is 3 lbs. Subtract the preload force from the tension force. In our example, the tension force (2 lbs.) subtracted from the preload force (3 lbs.) gives 1 lbs.

**What is the torque for bolts?**

Different bolt sizes and grades have different torque specifications. For example, 6 mm bolts with a 10.9 grade have a maximum torque value of 10 foot-pounds, while the same-size bolts with a 12.9 grade have a maximum torque value of 12 foot-pounds. Consult your shop manual for the most precise listings.