ASI 3001319 Waterproof M25 Plastic Cable Gland with Locknut, M25 Thread,10mm to 17 mm Clamping Range, Light Gray (Pack of 10): Amazon.com: Industrial & Scientific
IP68 Waterproof Cable Gland Locknut Washer M12 M16 M20 M25 For Junction Box UK | eBay
50.240ES | Jacob Cable Gland Locknut M40 | Distrelec Germany