Norton Atlas engine barrel and , head fitting kit, stainless steel.Original part number:067529s - cylinder head front nuts & washers x2067870s - cylinder head rear nut x1063192s - cylinder head sleeve nuts x2sc15c - barrel base set bsc x1 -067528 - 3/8 thick base nut x1 -067870s - 3/8 base nut x6 -067572 - 5/16 base nut x2 -066499s - 5/16 thick base washer x2 -064147s - 3/8 thick base washer x6 -016213s - 3/8 washer x1067918s - cylinder head centre bolt x124253 - outer head bolts x4016213s - head bolts washer x1000174 - 5/16" outer head bolt & washer x4