MAX-LOC Cord-Sealing Grip - 1 NPT - Male - 15.88-19.05mm - Nylon Compession Nut The 5552M (1300990119) is a MAX-LOC Strain Relief Cord-Sealing Grip. Thread size is 1 NPT. Body style is straight male. Cable diameter is 15.88-19.05mm (.625-.750 ). Made of stainless steel mesh with nylon compession nut.