Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 542-521-69PC7 found under Spring Flat by Merritt Chapman And Scott Corp. The National Stock Number assigned to this part is 5360004455466, 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 542-521-69PC7.