Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 993R0048 PC 3-1 found under O Ring by Warren Pumps Llc. The National Stock Number assigned to this part is 5331005797544, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 993R0048 PC 3-1.