Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12021-1 found under by Coda Octopus Colmek Inc. The National Stock Number assigned to this part is 5845014798339, and the Federal Supply Class is 5845 Underwater Sound Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12021-1.