Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R49388-916J found under O Ring by Curtiss Wright Electro Mechanical Corporation Div Steam And Air Solutions. The National Stock Number assigned to this part is 5331011261552, 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 R49388-916J.