Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 32558 found under Washer Vacuum Pump by Sargent Welch Scientific Co. The National Stock Number assigned to this part is 5310009645197, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 32558.