Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 137.000.823 found under Screw Cap Hexagon H by Ardox Corp. The National Stock Number assigned to this part is 5305014474660, 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 137.000.823.