Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1 1524 54 found under Spring Helical Comp by Qinetiq Ltd. The National Stock Number assigned to this part is 5360999621856, 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 B1 1524 54.