Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HD5-601-H found under Roller Grooved by David Round Company The. The National Stock Number assigned to this part is 3950011232120, and the Federal Supply Class is 3950 Winches Hoists Cranes And Derricks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HD5-601-H.