Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IS0-18-20 found under Screw Cap Hexagon H by Hannay Reels Inc. The National Stock Number assigned to this part is 5305014642362, 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 IS0-18-20.