Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 45 00053 015 found under Key Cap Spring by Key Tronic Corp. The National Stock Number assigned to this part is 5360013292303, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 45 00053 015.