Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 100R found under Winch Drum Hand Operated by David Round Company The. The National Stock Number assigned to this part is 3950011610140, 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 100R.