Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10689131-001 found under Valve Safety Relief by General Dynamics Land Systems. The National Stock Number assigned to this part is 4820016245787, 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 10689131-001.