We located a 40 pin double-male header that works well in the BBB with a standard header length below the circuit board on the bottom of the board and .310" sticking up on top of the pcb. A typical header pin rises .340" above the pcb so they are almost perfectly level with the other headers when mounted on the bottom (and soldered on the top).

These are good for providing stacking shield boards on the BBB, and connecting things like servos, which have female headers, on breadboards. They are also good for connecting two servo cables, or a servo with an extender cable. Sold in bags of 5 and 25.

Specifications

• Male Headers
• 40 pin
• Short side is .230" (5.8 mm) from the plastic.
• Long side is .370" (9.4 mm) from the plastic on the other side.
• Total pin length is .710" (17.5 mm)
• .100" pitch