Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4A22-AP found under Lining Steam Cylind by Acme Products And Engineering Inc. The National Stock Number assigned to this part is 3040011956830, 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 4A22-AP.