Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M8X55 U 5931 A 316 U 7323 found under Screw Machine by Metric Bolt And Nut Co Inc Of South. The National Stock Number assigned to this part is 5305151000801, 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 M8X55 U 5931 A 316 U 7323.