Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 83931 found under Sleeve And Mounting Assembly by Yoder Brake And Manufacturing Co. The National Stock Number assigned to this part is 2540014127835, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 83931.