M10 (10mm x 40mm) Cup Square Carriage/Coach Bolt & Nut Set - Steel (Pack of 10) 
 
 Quantity - 10 Bolts & 10 Nuts 
 
 Bolt Dimensions – 40mm x 10mm 
 
 Here is what the dimensions mean… 
 M - Metric thread 
 10 - Diameter of the inside of the bolt, in millimetres 
 40 - Length, in millimetres (from the base of the bolt head to the end of the thread) 
 Nut Dimensions - 10mm internal Diameter, 17mm external Diameter 
 
 Material 
 High Quality Steel - Provides protection from external elements and extends the life of the metal used to make these coach bolt sets.