Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TDS 12620 found under Setscrew by Allison Transmission Holdings Inc. The National Stock Number assigned to this part is 5305012548480, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TDS 12620.