The Noisebridge version A key is a 5 tumbler Schlage warded key. The pin code is not given directly here as a deterrent. The pin code is (from tip to shoulder):
The five digit integer corresponding to the definite integral of the square function from 0 to 50.23148 (aka 42 248).
This key was used at 83c Wiese and is currently used at 2169 Mission.