How to calculate the weight of extra long flat head machine screws?

No matter what type of things, in the delivery through express transport, generally need to choose the price of the product according to the weight of the freight company to transport. Then, how to calculate the weight of extra long flat head machine screws?

Formula for the weight of the extra long flat head machine screws: density ×3.14× diameter × length × diameter × length + head material for countersunk head

The section of “material density ×3.14× diameter × diameter × length” is to calculate the weight of the rod.

If the extra long countersunk head screw is full thread, then the above formula can be followed. But if it’s a half tooth, you have to take it apart at the bar. If the threaded part needs to be calculated separately, the unthreaded part needs to be calculated separately.

The reason for this calculation is that each customer has different requirements for the length of the thread, as well as for the diameter of the part without thread. This will cause the extra long flat head machine screws weight is not the same.