Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21856-53 found under Strap Assembly Litt by Telair International Incorporated. The National Stock Number assigned to this part is 1680007778394, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21856-53.