Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 638-48AP found under Stud Continuous Thr by Acme Products And Engineering Inc. The National Stock Number assigned to this part is 5307014242988, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 638-48AP.