Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS 1222S1 1 AS 063 DAD2 found under Cylinder Assembly A by Bauer Nilsen A S. The National Stock Number assigned to this part is 3040251503041, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HS 1222S1 1 AS 063 DAD2.