246 Piece Stainless Steel Nut, Bolt & Washer Selection Stainless Steel Grade 201 All in convenient re-sealable plastic storage case. Contains bolts in the following sizes : M3 x 25mm - 12 bolts M4 x 12mm - 16 bolts M4 x 20mm - 14 bolts M4 x 40mm - 10 bolts M4 x 50mm - 6 bolts M5 x 25mm - 10 bolts M6 x 25mm - 8 bolts M6 x 40mm - 6 bolts Contains nuts in the following sizes : M3 - 24 nuts M4 - 18 nuts M5 - 12 nuts M6 - 16 nuts Contains washers in the following sizes : M3 - 26 washers M4 - 18 washers M5 - 12 washers M6 - 16 washers