# How much torque do you need for screws?

## How much torque do you need for screws?

US Recommended Bolt Torque

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

Grade 2 | 18-8 S/S | |

3/4″ | 125 | 128 |

7/8″ | 129 | 194 |

1″† | 188 | 287 |

## How much torque does a 14mm bolt need?

Metric Recommended Bolt Torque

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

Class 8.8 | Class 10.9 | |

12 | 100 | 135 |

14 | 160 | 215 |

16 | 245 | 335 |

**How do you find the torque specs on a bolt?**

Begin with the formula T = K x U x D x P, where T is the torque, K is a standard representing 1.33, U is the coefficient of friction, D is the diameter of the fasteners, and P is the necessary preload.

### How much torque can you generate with a screw driver?

Torque screwdrivers can exert torques from 6 inch ounces (0.04 N⋅m) to at least 27 N⋅m. Although no single tool covers the entire range, low-, mid-, and high-torque ranges are available. Torque screwdrivers and torque wrenches have similar purposes and mechanisms.

### What is the torque for laptop screws?

While a screw for a laptop or a hard drive case may have torque settings as low as a single inch-pound of force (lbf.in) or even lower, a lawn mower engine shroud may need around 40 pound-feet of force (lbf) on a screw.

**How tight is hand tight torque?**

Hand tight is on average about 2ft-lb.

## How much torque does a M3 screw need?

Torque Specifications

Size | Min | Max |
---|---|---|

M3 | 10 | 1.4 |

M4 | 23 | 3.2 |

M5 | 46 | 6.3 |

M6 | 79 | 10.9 |

## How much torque can a 5/16 bolt take?

ASTM A449 / SAE Grade 5*

Bolt Size | TPI | Tightening Torque (ft lbs) |
---|---|---|

Plain | ||

5⁄16 | 18 | 17 |

3⁄8 | 16 | 31 |

7⁄16 | 14 | 49 |

**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.