Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 98578 FIND 1-4 found under O Ring by Griswold Industries Co. The National Stock Number assigned to this part is 5331005933234, 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 98578 FIND 1-4.