Description:Stainless Steel Metal Form A Flat Washers To Fit Bolts &amp;amp; Screws Repair Kit Tools，the form A flat washer is the most popular washer used in assembley &amp;amp; construction.<br>Specification:<br>          Size              d1=internal diameter       d2=outer diameter       t=thickness            M5       5.3       10       1           M6       6.4       12       1.6           M8       8.4       16       1.6           M10       10.5       20       2           M12       13       24       2.5           M14       15       28       2.5           M16       17       30       2.5           M18       19       34       3   <br>Package included:1 &amp;times; Flat Washers