Profile: Brass Fasteners Hose Hydraulic Fittings Components & Couplings is a manufacturer of brass fasteners, turned parts, hose plumbing pipes sanitary fittings, fluid power components, and electrical & cable accessories. Our bulkhead unions are provided with lock nuts, & check nuts. Our unions are available in brass and stainless steel. Our bulk head connectors and bulkhead fittings are available in various threads. We can also provide wooden case packing with 1 inch thick wood.