Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 135-1-166-12-1 found under Tube Air Blast Hori by Tiffin Metal Products Co. The National Stock Number assigned to this part is 1730009921199, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 135-1-166-12-1.