Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL1-5X3X18AA4 found under by Standridge Granite Corporation. The National Stock Number assigned to this part is 5220016630448, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PL1-5X3X18AA4.