NVENT 548400 / 548400 (NEW IN BOX) NVENT 548400 / 548400 (NEW IN BOX) INSULATOR, ISO-TP SERIES, 16 MM HEX, 4 MM THREAD, 500 VAC. Part Number 548400. The product is used surplus. Radwell is not an authorized surplus dealer or affiliate for the Manufacturer of this product. byJuly 3, 2026