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Spanner/Wrench Sizes PDF Print E-mail
Spanner/Wrench Sizes 

The following table table lists the relationship given between the thread size (metric) and the maximal width across the hexagonal flats (Spanner/Wrench size)

 ISO METRIC THREAD SPANNER SIZE (MM)
 M 1.6  3.2
 M 2    4
 M 2.5    5
 M 3  5.5
M 4    7
M 5    8
M 6  10
M 8  13
 M 10  17
 M 12  19
 M 14  22
 M 16  24
 M 18  27
 M 20  30
 M 22  32
 M 24  36
 M 27   41 
 M 30  46
 M 33   50 
 M 36   55 
 M 39   60 
 M 42   65 
 M 45 70
 M 48  75
 M 52   80 
 M 56  85
 M 60   90 
 M 64  95
 M 68 100
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