Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W0A473 found under Bolt Ribbed Neck by Roper Industries Inc Roper Pump. The National Stock Number assigned to this part is 5306007375863, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W0A473.