https://www.sparkfun.com/hex-standoff-threaded-4-40-aluminum-2-375in-60-33mm.html
Hex Standoff Threaded - #4-40, Aluminum, 2.375in. (60.33mm) - SparkFun Electronics
SparkFun Electronics is an online retail store that sells the bits and pieces to make your electronics projects possible.
hex standoff