How to calculate spanner size for a bolt

Look the torque spec for the bolt or nut or combination. Decide on how much force you can easily apply. Then calculate the length.

Multiply the first number which is the bolt size in inches or millimeters, by 1. Replies continue below Recommended for you.

RE: Spanner size - Bolt Size. As I sai very rough rule. Hope it saves you a journey! Metric are measured thread per millimeter. Inches are measured threads per inches.

Nm Now if a bigger spanner is use say. There is a range of bolt sizes in which the nut size is 1.

The diameter equal to the external diameter of the threads or the overall diameter of the part. Nominal diameter is more of a label than a size. For example, a bolt and nut may be described as being ½” diameter. But neither the external threads of the bolt nor the internal threads of the nut are exactly.

Also, hexagonal key sizes are given as the distance across their flats and so a MAllen Screw for example would need a 8mm key to fit it. A table of common metric spanner and key sizes is shown opposite. How to Measure Bolt Size Measure the diameter of the shank. As the pipe is for fire service, the flange size and schedule as well as the bolt or stud grade will be called.

A 3stainless steel flat washer is a round outer diameter thin plate with a center hole (inner diameter) punched to the size of the bolt or screw size. In this article, I have covered Flange Bolt Chart and Flange Stud Size. What is the thumb rule to calculate spanner size for a given bolt ? A standard chart is available that shows the size of a given bolt and corresponding spanner size.

Here you can see the same. But is this chart is not available, in that case, you can use thumb rule to get the spanner size. Approx spanner size is 1. If the nut is metric, count the number of lines on the tape measure to find the measurement.

If you count lines, the size is a 9-mm (millimeter) nut. How to Calculate Fastener Pullout. First measure the diameter. Another name for fastener is anchor bolt.

People use anchor bolts and fasteners to anchor fixtures and materials to a foundation. Anchor bolt pull-out strength represents the force required to pull the bolt or fastener out of a foundation. The formulas needed to calculate the. Shear stress is one of the forces that affect bolts.

When a bolt connects two or more parts, each of the parts can impart separate forces on the bolt , often in different directions. The result is shear stress at the plane through the bolt between the two connected components. If the shear stress in the bolt is too high, the bolt can break.