Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WSI4001UT found under Control Box Protective by Ametek Inc. The National Stock Number assigned to this part is 2920004721642, and the Federal Supply Class is 2920 Engine Electrical System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WSI4001UT.