ASI 3001313 Type 1900M16/X Maxiblock Standard Nylon Cable Gland with Locknut and Collar, M16 Thread, 19 mm Nut, 5 to 10 mm Clamping Range, Light Gray (Pack of 10): Amazon.com: Industrial & Scientific
Halex 2 in. Non-Metallic (NM) Sheathed Cable Clamp Connectors 05120 - The Home Depot