Female thread for welding on steel 1/8" NPT inch Female thread for welding on steel 1/8" inch NPT Steel Thread for welding If there is no thread available If a thread is required for various connections such as oil pipes, water pipes or other connections, but is not available, we offer threads for welding. This allows a thread to be created where it was not before. Simply drill a hole and weld it on. These threads are primarily provided with American thread dimensions, since our hydraulic fittings, with which lines can be manufactured themselves, also have these threads. Design: Female (female thread) Material: Steel Thread: 1/8" inch NPT 27 thread Diameter: 19mm