Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6-40-R5-K4 found under Truck Hand by Aar Manufacturing Inc. The National Stock Number assigned to this part is 3920010940010, and the Federal Supply Class is 3920 Material Handling Equipment Nonself-Propelled. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6-40-R5-K4.