Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D15138 found under Spacer Ring by David Brown Gear Systems Limited. The National Stock Number assigned to this part is 5365995005494, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D15138.