Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 145R3120-1 found under Bolt Close Tolerance by Associated Aircraft Supply Co. The National Stock Number assigned to this part is 5306011495774, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 145R3120-1.