NP664
It (NEMA XPC) is a composite made from unbleached kraft paper with pigmented cover plies on the surface. This low-cost paper phenolic is a room temperature punching grade with high flexural strength and mechanical and electrical properties similar to NP612. NP664 is UL listed (File Number E-187147). NP664 complies with the requirements of MIL-I-24768/20, Type PBM-PC.