M8, SHORT, Hex Bolts, Part Threaded, BZP, Metric, 8.8 High Tensile.

M8, SHORT, Hex Bolts, Part Threaded, BZP, Metric, 8.8 High Tensile.
 
Thread Size = 8mm
Head/Spanner Size = 13mm
 
Thread Length: There is around 18-20mm of Thread on the Bolts. Total Length of Bolt is measured from underneath the head.