6.5mm x 3mm Male to 5.5mm x 2.1mm Female DC Power Connector Jack Adapter 6 Pcs | eBay
Amazon.com: upHere 24 Pieces Set = 24-pin x 4, 8-pin x 12, 6-pin x 8 for 3 mm up to 3.4 mm/0.13inch- Black(3.4 mm/0.13inch)-CM245 : Clothing, Shoes & Jewelry
Silicone Rubber Wire Strain Relief for Miniature Thermocouple Connecto | Evolution Sensors and Controls
Type J Standard Size 3 Round Pin Male Thermocouple Connector | Evolution Sensors and Controls
Keeper Quick Connect for 6 AWG Wire KTA14127-1 - The Home Depot