Data For Scrutineers 
T21. Measuring Engines: 
T22. OEM Parts 
T23. Rotary Motors: 
T24. RollBars and Cages: 
T25. 
T26 
Metric
Diameter

Imperial
Equivalent.


M6

1/4

0.25"

M8

5/16

0.312"

M10

3/8

0.375"

M11

7/16

0.437"

M12

1/2

0.5"

M16

5/8

0.675"

T27  Conversions: 
10 mm  0.393"  
1 inch  25.4 mm  2.54 cm 
1 Kg.  2.204 Ib  
1lb  
1 litre  
cu. ins. into cc.  
lb. into Kg   
kg into lb.  