Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SC-4100 PART NO K-27001-A found under Parts Kit Safety Re by Parker Hannifin Ltd. The National Stock Number assigned to this part is 4820015045381, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SC-4100 PART NO K-27001-A.