Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3 4 10 UNC 3A X 1 3 4 3 4 10 U found under Stud Plain by National Aerospace Standards. The National Stock Number assigned to this part is 5307002487980, 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 3 4 10 UNC 3A X 1 3 4 3 4 10 U.