The part of the stock list used for threaded pipe with or without fitting is known as ____________.

The term "Make-on list" refers specifically to the part of the stock list that deals with threaded pipe and associated fittings. This list is crucial for identifying the quantities and types of materials necessary for a project involving piping systems, especially in sprinkler system installations.

In the context of sprinkler contracting, the Make-on list helps ensure that all the components, including threaded pipes that may require specific fittings, are accounted for in the inventory. It's essentially a preparation tool that allows contractors to organize and plan their material needs in advance of the project.

Other options do not accurately describe this specific aspect of materials used in conjunction with threaded piping. For instance, a weld sheet typically pertains to items involving welding processes, which is not the focus here. The miscellaneous material sheet usually covers a broader range of materials not limited to pipes. A field order refers to items needed on-site during construction, which is a reactive rather than a proactive list for planning.