Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MPX43-3 found under Key Woodruff by Met Pro Corporation. The National Stock Number assigned to this part is 5315006165526, 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 MPX43-3.