These custom silicon bronze slotted machine screws were manufactured domestically with a fillister head diameter of 0.5″.  2,000 pieces in total were produced using C65500 half hard siliconze bronze material.  Head height was set at .110 +/- .005″ and the thread length underneath the head was set at .75 +/- .01″.  1/4-20 thread was incorporated and the slot width was .055 +/- .01″.