Slim Gender Changer DB9 Male to DB9 Male.
Connect two DB9 plugs with the gender changer. The adapter doesn't use any extra circuitry and is a straight-through plug. This provides better compatiblity. The adapter is easy to use, just a simple plug that is brighty-colored for easy cable identification.
Slim Gender Changer DB9 Male to DB9 Female.
RS232 DB9 Male to DB9 Male Null Modem Adapter.
The compact (0.4″ × 0.5″) D24V5F5 switching step-down (or buck) voltage regulator takes an input voltage between 7V and 36V and efficiently reduces it to 5V while allowing for a maximum output current of 500 mA.
Steel Machine Key 3/16" x 3/16", 3/4" long. These keys are economical with high strength and will fit 3/16" keyways.