Amazon.com: K42-25/9-15-A4N D-Sub Assembly 25 Pin Female/9 Pin Male/15 Pin High Density Female all in a Right Angle PCB Connector (1 piece) : Electronics
Amazon.com: Connectors Pro 25-Pack 10P 2.54mm 0.1" Pitch PCB Female Pin Headers 2x5 Dual Rows 10 Pins Female Sockets to Male Straight PCB DIP, Double Rows PC Board Through-Board Strip (2x5-10P-25PK) :
Amazon.com: Connectors Pro 25-Pack 34P 2.54mm 0.1" Pitch PCB Female Pin Headers 2x17 Dual Rows 34 Pins Female Sockets to Male Straight PCB DIP, Double Rows PC Board Through-Board Strip : Electronics
25 Pin Terminal Block Screws, Signal Terminal Socket Module PCB Terminal Board Connector for Communication Debugging(DB25-G2): Amazon.com: Industrial & Scientific
Amazon.com: Connectors Pro 25-Pack 30P DC3 2.54mm 0.1" Pitch 30 Pins Male Box Headers 2x15 Dual Rows 30P Male Straight Pin PCB DIP, Double-Row 2x15 30-P 2.54 mm DC3 IDC Connector :
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SamIdea 25-Pack 3-Pin 5.08mm Pitch Male Female PCB Screw Terminal Block for Arduino UNO Shield: Amazon.com: Industrial & Scientific
25 Pin Signal Terminal Socket, Terminal Block Distribution Module Riveting Type PCB Board for Communication Debugging(DB25-G2): Amazon.com: Industrial & Scientific