Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B21587-2 found under Spring by G And L Industries Inc. The National Stock Number assigned to this part is 5360011254032, 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 B21587-2.