Length/Diameter Conversion Chart

 Inch Millimeters
3/16 4.7mm
7/32 5.5mm
1/4 6.3mm
9/32 7mm
5/16 7.9mm
11/32 8.7mm
3/8 9.5mm
7/16 11mm
1/2 12.7mm
9/16 14.3mm
5/8 15.8mm
3/4 19mm
7/8 22mm
1" 25mm