Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K151B6-1-4BP found under Valve Angle by Teledyne Technologies Inc. The National Stock Number assigned to this part is 4820005549957, 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 K151B6-1-4BP.