Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D2-9717PC179 found under Spring Brake Release by U S M Corp. The National Stock Number assigned to this part is 5360002130480, 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 D2-9717PC179.