Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 48B20051-1 found under Valve Angle by San Antonio Air Logistics Center. The National Stock Number assigned to this part is 4820005068307, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 48B20051-1.