NP Nail Plates General Hardware The NP Nail Plates are an ideal economical solution for attaching wooden members together in a non-structural compaction. Also may be used as a prescriptive fap plate splice per the International Residential Code (IRC) They are per-pusiched for Bd someone nails. Materials: 20 gauge Finish: 690 galvanizing Odes: IRC RE02.3.2 installation: « Use nails appropriate for intended use. Holes are sized for 8a comment (1131° dia.