Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D90-355-8731 found under Pump Hydraulic by Hurst Industries Inc. The National Stock Number assigned to this part is 1650011036896, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D90-355-8731.