Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 560-018 found under Adapter And Straine by Hydro Test Products Inc. The National Stock Number assigned to this part is 4210003775036, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 560-018.