Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9099D06ITEM9(SILICONE found under O Ring by Kapl Inc. The National Stock Number assigned to this part is 5331014120328, 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 9099D06ITEM9(SILICONE.