Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R-2-11-12 found under Stud Self Locking by Rolls Royce Marine North America. The National Stock Number assigned to this part is 5307014751434, 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 R-2-11-12.