Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U19-143 found under Hose Connection Die by Perkins Engines Inc. The National Stock Number assigned to this part is 4720004468948, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U19-143.