Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RD15951-112SP found under Ring Retaining by Crane Company. The National Stock Number assigned to this part is 5325012156422, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RD15951-112SP.