Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SAS4 4-1 2IN NST-M found under Coupling Hose Fire Fighting by Halprin Supply Co. The National Stock Number assigned to this part is 4210012444715, 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 SAS4 4-1 2IN NST-M.