Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12840 found under Stud Locked In by Triumph Engine Control Systems Llc. The National Stock Number assigned to this part is 5307003738620, 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 12840.