Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SV500B-3-7 found under Guide Valve Stem by Wheeler Bros Inc. The National Stock Number assigned to this part is 4820012355695, 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 SV500B-3-7.