UNC HEXAGON FULL NUTS ZINC PLATED STEEL Hexagon full nuts with UNC thread pattern.Bright zinc plated grade 1 steel.UNC Threads sizes;8UNCx32tpi10UNCx24tpi1/4UNC x 20tpi5/16UNCx18tpi3/8UNCx16tpi7/16UNCx14tpi1/2UNCx13tpi