Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 815-1853010 PIECE 38 found under O Ring by Comdial Business Communications Corp. The National Stock Number assigned to this part is 5331011277613, 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 815-1853010 PIECE 38.