Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21.69.61-12 found under Stopper Assembly Chain by Macgregor Comarain Inc. The National Stock Number assigned to this part is 2040012988832, and the Federal Supply Class is 2040 Marine Hardware And Hull Items. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21.69.61-12.