Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9141 found under Square Surface Plate by Supfina Machine Company Inc. The National Stock Number assigned to this part is 5220002931650, 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 9141.