Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KPR3741-326-3 found under Parts Kit Pressure Regulating Va by Autoflow Products Co. The National Stock Number assigned to this part is 4820013002691, 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 KPR3741-326-3.