Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R3553X3-32 found under Rivet Tubular by Chicago Rivet And Machine Co. The National Stock Number assigned to this part is 5320007254559, and the Federal Supply Class is 5320 Rivets. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R3553X3-32.