Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21104 found under Spacer Throttle Bo by Satair A S. The National Stock Number assigned to this part is 2995004325778, and the Federal Supply Class is 2995 Miscellaneous Engine Accessories Aircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21104.