Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VSF5-1IN10T040P found under Valve Safety Relief by Ruthman Pump And Engineering Inc. The National Stock Number assigned to this part is 4820004598317, 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 VSF5-1IN10T040P.