Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MY20331 5203 found under Pin Headed Threaded by Dassault Aviation. The National Stock Number assigned to this part is 5306143701613, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MY20331 5203.