Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K-2004 found under Parts Kit Valve by N L Industries Inc. The National Stock Number assigned to this part is 4820011047207, 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 K-2004.