Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1-27-1 found under Stud by Valad Electric Heating Corp. The National Stock Number assigned to this part is 5307010197218, 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 R1-27-1.