Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN505C4-18 found under Screw Machine by Power Control Devices Inc. The National Stock Number assigned to this part is 5305013119079, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AN505C4-18.