Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number COB-O-SIL EH-5 found under Silica Pulverized by Cabot Corporation. The National Stock Number assigned to this part is 9620014754559, and the Federal Supply Class is 9620 Minerals Natural And Synthetic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like COB-O-SIL EH-5.