Silicon Bronze washers manufactured from C65100 or C65500 bronze depending upon size. Please get in contact if a particular material grade is required.
 
Dimensions are as follows:
 
Imperial
 
1/4" - ID: 0.256" - OD: 0.572" - Thickness: 0.032"
5/16" - ID: 0.334" - OD: 0.749" - Thickness: 0.057"
3/8" - ID: 0.393" - OD: 0.878" - Thickness: 0.057"
7/16" - ID: 0.440" - OD: 0.878" - Thickness: 0.057"
1/2" - ID: 0.504" - OD: 1.125" - Thickness: 0.079"
9/16" - ID: 0.561" - OD: 1.248" - Thickness: 0.079"
 
Metric
 
1/4" - ID: 6.52mm - OD: 14.52mm - Thickness: 0.81mm
5/16" - ID: 8.49mm - OD: 19.02mm - Thickness: 1.46mm
3/8" - ID: 10.00mm - OD: 22.31mm - Thickness: 1.46mm
7/16" - ID: 11.19mm - OD: 22.31mm - Thickness: 1.46mm
1/2" - ID: 12.82mm - OD: 28.58mm - Thickness: 2.01mm
9/16" - ID: 14.25mm - OD: 31.72mm - Thickness: 2.01mm