Amazon.com: Chanzon Round Pin Header Strip for Arduino Gpio 4 pin x 50pcs Male Headers Pins Straight Single Row Gold Plated Pitch 2.54mm 0.1 inch Breakaway for PCB Connector Raspberry pi Machine
Which side of machined pin header should I solder? - General Electronics - Arduino Forum
4-PIN CONNECTOR W/HEADER, 0.10" | All Electronics Corp.