2.54mm Male Header Pin Strip 40-Pin Blue

A pin header is the basic building block behind nearly every PCB connector and jumper wire connection in hobbyist electronics - single-row male pins at the standard 2.54mm (0.1 inch) pitch that mates directly with female jumper wires, IC sockets, and the vast majority of Arduino, Raspberry Pi, and general prototyping hardware. Selling as a full 40-pin strip designed to snap apart at any point means one strip serves dozens of different projects needing anywhere from a single pin to a full row.

Being a genuinely universal standard rather than a proprietary connector, it works interchangeably across essentially every microcontroller board, breakout module, and prototyping board in common use - there's no compatibility question to check before using it. The blue housing color is purely cosmetic (some projects use color to distinguish pin function or board section) but doesn't affect electrical performance.

Common uses are adding header pins to a bare PCB or breakout board that didn't come with them pre-soldered, building custom jumper and connector arrangements for prototyping, and general PCB assembly wherever a standard 0.1-inch pin connection point is needed.