Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CRB 1 4 found under Resistor Fixed Film by R Ohm Corp. The National Stock Number assigned to this part is 5905010760955, 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 CRB 1 4.