Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2X11 2-10A 6 1 2-131 found under O Ring by Duriron Co Inc. The National Stock Number assigned to this part is 5331013405560, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2X11 2-10A 6 1 2-131.