larger farm type items, hydraulics, transmissions, wheels,bearings www.surpluscenter.com www.northerntool.com applied industrial
warehouse supply, shop tools, etc www.mcmaster.com www.Grainger.com www.msc-direct.com www.harborfreight.com craigslist
smaller mechanical parts www.smallparts.com www.wmberg.com www.sdp-si.com
electromechanical american science and surplus www.allelectronics.com
electronics www.adafruit.com www.sparkfun.com
Fasteners fastenal