M10 

A4 Marine Grade Stainless Steel 

M10 ( 10.5mm  Hole ) 

x 50mm Diameter 

3mm Thick 

PENNY REPAIR WASHERS MUDGUARD WASHERS STAINLESS STEEL 

M10 x 50mm x 3mm Marine Grade A4 PENNY WASHERS MUDGUARD WASHERS STAINLESS STEEL