Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1K2-60-593B found under Screw Cap Hexagon H by Metrex Valve Corp. The National Stock Number assigned to this part is 5305016310001, 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 1K2-60-593B.