1/2 Inch 1/2" 0.5 NPT Black Nylon Cable Gland Strain Relief with Gasket and Locknut $5.80 B00HBH59MO
10 Pc 1/2 Inch 1/2" 0.5 NPT Black Nylon Cable Gland Strain Relief with Gasket and Locknut 10 Pack $17.49 B00I7E5JMU