1/4" #0 Brass Grommets and Washers 2000 Package 0 1/4" #0 Brass Grommets and Washers 2000 Package #0 ( 1/4") Size Made of Iron with Brass Finish Hole Size After Setting = 1/4"(6mm) Flange Diameter (Top of Grommet)=0.38"(9.65mm) Under Flange Height=0.156"(3.95mm)