Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HR 50-12-8 IN found under Stud Continuous Thread by Cooper B Line Inc. The National Stock Number assigned to this part is 5307015349859, 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 HR 50-12-8 IN.