Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1-161-1 found under Stud Plain by Valad Electric Heating Corp. The National Stock Number assigned to this part is 5307013497237, 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 R1-161-1.