Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20X-2581 found under Stud Plain by Micro Systems Inc. The National Stock Number assigned to this part is 5307016485995, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20X-2581.