Metric hex bolt used on Bernardet side cars and many prewar French motorcycles and automobiles. Made to prewar standards with thicker head unlike modern metric fasteners that have a smaller hex and thinner height.
Material: 4140 Steel, heat treat grade 8
Finish: Natural
Thread: M10-1.5
Thread length: 20mm
Hex: 17mm
OAL: 28mm
Length under head: 21mm
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