Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-8011811 found under Tee Tube by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 4730004692200, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99-8011811.