Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LL-1552 REV B ITEM 5 found under Spring Helical Compression by Olmsted Products Company Llc. The National Stock Number assigned to this part is 5360015147505, 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 LL-1552 REV B ITEM 5.