Profile: National Bushing & Mfg. Corp. is a manufacturer of precision drill bushings and related products. We produce spacers, inserts, shafts and buttons. Our products are used in commercial trucks, construction equipment, printing equipment, food service equipment and several other markets. We are accredited with ISO 9000:2000 certification. We specialize in working with various materials that include steel, aluminum, brass and plastic. We also offer heat treating services.