HNX screw cover cap metal blind plug for cable gland - Zhejiang Hongxiang Connector Co. Ltd.
ASI 3019280 Internal Plug for Plastic and Brass Cable Glands, Type TCP40, Used to Seal Open Cable Gland, Order Correct Size, Black (Pack of 50): Amazon.com: Industrial & Scientific
ASI 3019225 Internal Plug for Plastic and Brass Cable Glands, Type TCP12, fits M12 and PG7 Cable Glands, Black (Pack of 100): Amazon.com: Industrial & Scientific
Cable Gland Plug - Collar Type Plug - India | Metalmech Engineering
Nylon Cable Gland Screw Plugs Manufacturer
4 Pairs Waterproof FOR Anderson Plug Cable Gland Inserts RED&BLACK Plugs - Walmart.com