I hope you mean a 5/8 bolt (58 inches would take a machine to turn). Measure your bolt head across the opposing flats. For a 5/8 bolt it may be 1 inch or even larger. The last one I did was in a truck's shock mounting and that took a 1.25 inch socket.
18mm
That's a wrench made to a certain size -ie, 10mm, or 7/16, or 14mm . These wrenches can only be used for one size bolt each, as opposed to a Crescent wrench which can be used for many sizes.
To calculate wrench size you measure across the flat surfaces of the nut or bolt, then pick a wrench marked with that size. Be careful, there are metric and SAE nuts and bolts and some wrenches are close but not right. -For instance you should not use a 1/2" wrench on a 12 mm nut. -It may look right, but will round the edges of the nut.
A 35mm wrench....
An adjustable wrench is used when you don't know the exact size of the nut you will be turning
That refers to the size wrench necessary to tighten or loosen the bolt.
The effective diameter of the bolt defines the size of the bolt head. Hence the size of the spanner or wrench that fits the bolt. There are certain exceptions but these are usually specialist applications.
No. it's determined by the distance over the opposing flats of the bolt head.
A 1 1/4" wrench will fit a bolt of the same size .
Depends on size of wrench.
Type and year of car would help.
18mm
A 10mm wrench, or if you don't have metric wrenches, a 13/32 wrench.
what the hex a wrench? Hex wrench is short for hexagonal wrench, that is a wrench or spanner designed to fit a certain size nut or bolt.
8mm
The original engine oil drain plug wrench size would be 15mm.
14mm, a six point would be best.