ASI 3001010 Nylon/Plastic Cable Gland, Strain Relief Cord Grip, Type 1900.07, PG7 Threads, 15 mm Nut, 3.5 mm to 7 mm Clamping Range (Pack of 100): Amazon.com: Industrial & Scientific
Thomas & Betts - 0.75 to 0.88″ Liquidtight Straight Strain Relief Cord Grip - 54059936 - MSC Industrial Supply
Hubbell / Kellems 074-01-018 3/4" x .625"-.750" Deluxe Cord Grip - Straight Male Thread | Cooper Electric
Pulling Grips Strain Relief Cord Cap Best To Prevent Electrical Cords Pulling Out