Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 530 1 4IN found under Cock Shutoff Screw by Eaton Aeroquip Inc. The National Stock Number assigned to this part is 4820002548640, 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 530 1 4IN.