Bolt - 8 mm heavy duty white
Black or white depending on supply
Heavy duty coil bolt for larger coils.
8 mm in diameter x 50 mm long.
If your larger coil has trouble staying tight and moves around on the shaft with the standard 6 mm bolt then this might fix the problem. The 8 mm nylon bolt has more grip than the standard 6 mm type. Some coils and shafts may need to be drilled out to 8 mm for this to fit.