Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 974507-100 found under Key Woodruff by Armstrong Pumps Inc. The National Stock Number assigned to this part is 5315012581494, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 974507-100.