Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W21-1500PORM5-5W found under Resistor Special by Welwyn Components Ltd. The National Stock Number assigned to this part is 5905010726593, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W21-1500PORM5-5W.