Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 71S102 found under Valve Safety Relief by Derbyshire Mack And Morgan Inc. The National Stock Number assigned to this part is 4820002891857, 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 71S102.