The Strong-Drive SDCP Timber-CP screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber (CLT) and mass timber construction, as well as general interior applications. These partially threaded, 0.315"- and 0.394"-diameter structural fasteners are designed to pull structural members together with superb holding power and excellent load capacity. The large, flat head and under-head nibs provide for clean countersinking, flush with the surface. Predrilling is not typically required. For interior and dry applications only.